Annals of Coloproctology

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Case Report

Anorectal benign disease

Chronic fistula in ano associated with adenocarcinoma: a case report with a review of the literature: Nalini Kanta Ghosh, Ashok Kumar; Ann Coloproctol. 2024;40(Suppl 1):S1-S5. Published online May 16, 2024; DOI: https://doi.org/10.3393/ac.2022.00752.0107

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Abstract PDF: The malignant transformation of chronic fistula in ano is rare, accounting for 3% to 11% of all anal canal malignancies. It results from long-standing inflammation and chronic irritation. No guidelines are available for the management of these cases. We herein present a case report of a 55-year-old man who presented with a history of constipation, perianal pain, and discharging fistula in ano of 4-year duration and underwent fistula surgery with recurrence. Biopsy of the fistulous tract revealed adenocarcinoma. He received neoadjuvant chemoradiotherapy, followed by abdominoperineal excision including excision of the fistulous tract. After 18 months of follow-up, he is free of recurrence. We present this case with a review of the literature, highlighting the management strategies.

Original Article

Malignant disease, Rectal cancer,Prognosis and adjuvant therapy,Minimally invasive surgery

Should transanal total mesorectal excision be implemented in medium-sized colorectal unit? technical and oncological outcome: Man-fung Ho, Dennis Chung-Kei Ng, Janet Fung-yee Lee, Simon Siu-man Ng; Ann Coloproctol. 2022;38(3):207-215. Published online July 28, 2021; DOI: https://doi.org/10.3393/ac.2020.00941.0134

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Abstract PDF

Purpose
This study was performed to evaluate the outcome of implementation of transanal total mesorectal excision (TaTME) for low rectal cancer in a regional hospital and in comparison to laparoscopic (Lap) TME.
Methods
Consecutive patients with low rectal cancer of which the lowest border of the tumour was located beween 1 and 5 cm from the puborectalis who underwent TME at North District Hospital between January 2013 and December 2019 were included. Clinical, operative, and pathologic outcomes were compared between Lap TME and TaTME. The primary end point was complication profile.
Results
Thirty-five patients underwent Lap TME and 45 patients underwent TaTME for low rectal cancer. The conversion rate of the TaTME group was significantly lower than that of the Lap TME group (4.4% vs. 20%, P=0.029), but the operating time was longer (259 minutes vs. 219 minutes, P=0.009). The tumour location was significantly lower in the TaTME group, but the distal resection margins were adequate and not different between both groups. The TaTME group had higher incidence rates of prolonged ileus and urinary tract infection, but the other complications were similar between the two groups. The resection margin positivity rates of the TaTME and Lap TME groups were 2.2% and 5.7%, respectively (P=0.670). At a median follow up of 39 months, no abnormal early recurrence was detected.
Conclusion
It is technically feasible and oncologically safe to perform TaTME in a medium-volume colorectal unit. Patients with difficult pelvic anatomy can benefit by reducing the risk of conversion and margin positivity rate.

Citations

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Sex Disparities in Rectal Cancer Surgery: An In-Depth Analysis of Surgical Approaches and Outcomes
Chungyeop Lee, In Ja Park
The World Journal of Men's Health.2024; 42(2): 304. CrossRef
Do Laparoscopic Approaches Ensure Oncological Safety and Prognosis for Serosa-Exposed Colon Cancer? A Comparative Study against the Open Approach
Ji-Hyun Seo, In-Ja Park
Cancers.2023; 15(21): 5211. CrossRef

Case Report

Metachronous carcinoma at the colostomy site after abdominoperineal resection of rectal cancer: a case report: Young Sun Choi, Kil-young Lee, Youn Young Park, Hyung Jin Kim, Jaeim Lee; Ann Coloproctol. 2023;39(2):175-177. Published online July 27, 2021; DOI: https://doi.org/10.3393/ac.2020.00185.0026

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Abstract PDF

Metachronous carcinoma at the colostomy site is very rare after abdominoperineal resection. A 53-year-old male patient underwent an abdominoperineal resection 6 years earlier for rectal cancer developed metachronous carcinoma at the site of stoma. A portion of the colon, including the stoma and the surrounding skin, was resected and a new stoma was created in the transverse colon. Although the occurrence of carcinoma at the stoma site is a rare condition, careful observation for the stoma and colonoscopy for surveillance are necessary.

Citations

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Tumor Recurrence at the Colostomy Site: A Rare Case Report and Literature Review
Abdelhak Ettaoussi, Ilias El Azhari, Nassima Fakhiri, Abdessamad Majd, Kamal Khadija, Mounir Bouali, Abdelilah El Bakouri, Khalid Khaleq, Khalid El Hattabi
European Journal of Medical and Health Research.2025; 3(3): 215. CrossRef
Colostomy‐site carcinoma with primitive phenotype in a rectal cancer patient after achieving pathological complete response with neoadjuvant chemoradiotherapy
Takayuki Kodama, Maki Kanzawa, Hiroshi Hasegawa, Shuichi Tsukamoto, Mari Nishio, Manabu Shigeoka, Yu‐ichiro Koma, Tomoo Itoh, Hiroshi Yokozaki
Pathology International.2024; 74(1): 33. CrossRef
Metachronous Carcinoma at Colostomy Site Post Abdominoperineal Resection – A Rare Presentation Case Report
Muhammed Huzaifa, Ankita Singh, Vaibhav Aggarwal, Anita Dhar
Clinical Cancer Investigation Journal.2023; 12(2): 1. CrossRef
Peristomal adenocarcinoma 16 years after colorectal adenocarcinoma resection with curative intent
Kayleigh A M van Dam, Thaís T T Tweed, Bart de Vries, Henricus J Belgers
Journal of Surgical Case Reports.2023;[Epub] CrossRef

Original Article

Malignant disease, Rectal cancer, Functional outcomes

Early and Late Functional Outcomes of Anal Sphincter-Sparing Procedures With Total Mesorectal Excision for Anorectal Adenocarcinoma: Osama Eldamshety, Sherif Kotb, Ashraf Khater, Sameh Roshdy, Mohamed Elashry, Mohamed S. Zahi, Hend M. Hamdey Rashed Elkalla, Waleed Elnahas, Omar Farouk, Adel Fathi, Ahmed Senbel, Emad-Eldeen Hamed, Khaled Abdelwahab, Islam Abdou Elzahby, Ahmed abdallah, Mahmoud Abdelaziz, Emanuele Lezoche; Ann Coloproctol. 2020;36(3):148-154. Published online April 20, 2020; DOI: https://doi.org/10.3393/ac.2018.07.19

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Abstract PDF

Background
The study aims to assess the functional outcome of anal sphincter sparing procedures (SSP) with TME for anorectal adenocarcinoma.
Methods
In a multicentric, prospective, single-group study in the period between December 2012 and November 2017, 93 patients presented with anorectal adenocarcinoma were included in the study. Sixty-nine patients underwent SSP with TME. SSP included the combined approach of transabdominal TME with intersphincteric resection (ISR) or transanal transabdominal TME (TATA). Using the Per Anal Examination Scoring System (PASS), postoperative anal function was assessed after one year.
Results
Bowel motility time was 50 (±19) hours. The time needed for narcotic analgesia was 54 (±18.8) hours. Mean hospital stay was 15.4 (±10.25) days. Incidence of evident fecal incontinence after ISR is 10.6% (7/67 cases). The Per Anal Examination Scoring System (PASS) findings of 69 cases are as follows: extremely hypotonic 8.6% (6 cases), slightly hypotonic 26.1% (18 cases), normal tone 58% (40 cases), slightly stenotic 3 cases (4.3%), or occluded 2.9% (2 cases). Urinary dysfunction occurred in one case (1.4%). Temporary diversion was performed in 61 patients (87.1%).
Conclusion
Sphincter preservation with TME for anorectal adenocarcinoma helps avoid permanent stoma and provides a reasonable functional outcome. PASS is a new application for postoperative assessment of anal function

Citations

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Transanal Minimally Invasive TME (TaTME) Versus Non-Endoscopic Transanal Intersphincteric Resection of Post-Neoadjuvant Ultralow Rectal Adenocarcinoma: A Multicentric, Matched Case–Control Study
Osama Eldamshety, Mohamed Abdekhalek, Amir M. Zaid, Essam Attia, Mohamed Zuhdy, Emanuel Lezoche, Giovanni Lezoche, Enjy Mosaad, Marwa Abogabal, Islam Elzahby
Indian Journal of Surgery.2025;[Epub] CrossRef
Pathologic Implications of Magnetic Resonance Imaging-detected Extramural Venous Invasion of Rectal Cancer
Hyun Gu Lee, Chan Wook Kim, Jong Keon Jang, Seong Ho Park, Young Il Kim, Jong Lyul Lee, Yong Sik Yoon, In Ja Park, Seok-Byung Lim, Chang Sik Yu, Jin Cheon Kim
Clinical Colorectal Cancer.2023; 22(1): 129. CrossRef
International Society of University Colon and Rectal Surgeons survey of surgeons’ preference on rectal cancer treatment
Audrius Dulskas, Philip F. Caushaj, Domas Grigoravicius, Liu Zheng, Richard Fortunato, Joseph W. Nunoo-Mensah, Narimantas E. Samalavicius
Annals of Coloproctology.2023; 39(4): 307. CrossRef
Multidisciplinary treatment strategy for early rectal cancer
Gyung Mo Son, In Young Lee, Sung Hwan Cho, Byung-Soo Park, Hyun Sung Kim, Su Bum Park, Hyung Wook Kim, Sang Bo Oh, Tae Un Kim, Dong Hoon Shin
Precision and Future Medicine.2022; 6(1): 32. CrossRef
Watch and wait strategies for rectal cancer: A systematic review
In Ja Park
Precision and Future Medicine.2022; 6(2): 91. CrossRef
Current status and role of robotic approach in patients with low-lying rectal cancer
Hyo Seon Ryu, Jin Kim
Annals of Surgical Treatment and Research.2022; 103(1): 1. CrossRef
Robotic surgery for colorectal cancer
Sung Uk Bae
Journal of the Korean Medical Association.2022; 65(9): 577. CrossRef
Update on Diagnosis and Treatment of Colorectal Cancer
Chan Wook Kim
The Ewha Medical Journal.2022;[Epub] CrossRef
Low Anterior Resection Syndrome: Pathophysiology, Risk Factors, and Current Management
Seung Mi Yeo, Gyung Mo Son
The Ewha Medical Journal.2022;[Epub] CrossRef
Current Status and Future of Robotic Surgery for Colorectal Cancer-An English Version
Sung Uk Bae
Journal of the Anus, Rectum and Colon.2022; 6(4): 221. CrossRef
Is It a Refractory Disease?- Fecal Incontinence; beyond Medication
Chungyeop Lee, Jong Lyul Lee
The Ewha Medical Journal.2022;[Epub] CrossRef
Intraoperative neuromonitoring in rectal cancer surgery: a systematic review and meta-analysis
Athina A. Samara, Ioannis Baloyiannis, Konstantinos Perivoliotis, Dimitrios Symeonidis, Alexandros Diamantis, Konstantinos Tepetes
International Journal of Colorectal Disease.2021; 36(7): 1385. CrossRef
Robotic Intersphincteric Resection for Low Rectal Cancer: Technical Controversies and a Systematic Review on the Perioperative, Oncological, and Functional Outcomes
Guglielmo Niccolò Piozzi, Seon Hahn Kim
Annals of Coloproctology.2021; 37(6): 351. CrossRef
Functional outcomes after sphincter-preserving surgeries for low-lying rectal cancer: A review
Eun Jung Park, Seung Hyuk Baik
Precision and Future Medicine.2021; 5(4): 164. CrossRef
Simplification or Accuracy: In Assessing Functional Outcomes After Intersphincteric Resection for Low Rectal Cancer
Kyung Jong Kim
Annals of Coloproctology.2020; 36(3): 129. CrossRef

Case Reports

Malignant disease,Rare disease & stoma

Extensive Resection for Treatment of Locally Advanced Primary Mucinous Adenocarcinoma Arising From Fistula-in-Ano: Jordan Au, Francis M. Hulme-Moir, Andrew Herd, Mathew A. Kozman; Ann Coloproctol. 2021;37(Suppl 1):S7-S10. Published online November 26, 2019; DOI: https://doi.org/10.3393/ac.2019.11.19

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Abstract PDF

We report a case of a 66-year-old male who presented with a locally advanced primary mucinous adenocarcinoma arising from a fistula-in-ano. The presentation was typical for perianal sepsis and fistula-in-ano with anal pain and chronic discharge. Initial treatments with fistula debridement and seton were performed. Subsequent review of histology revealed underlying adenocarcinoma, while magnetic resonance imaging (MRI) showed local invasion into the prostate. The patient received neoadjuvant chemoradiotherapy followed by pelvic exenteration to maximize the chance of achieving cure. Features of this case are discussed together with its implications, including treatment guidelines and typical MRI findings.

Citations

Citations to this article as recorded by

Perianal Mucinous Adenocarcinoma: A Case Report and a Systematic Review of the Literature
Ioannis D. Gkegkes, Vassilis Milionis, Nikolaos Goutas, Ioannis Mantzoros, Antonia A. Bourtzinakou, Apostolos P. Stamatiadis
Journal of Gastrointestinal Cancer.2025;[Epub] CrossRef
Perianal Mucinous Adenocarcinoma Found Incidentally From Perianal Mass
Seyed Khalafi, Malini Riddle, Brittany Harper, Vid Fikfak
Cureus.2023;[Epub] CrossRef
Advances in the Treatment of Colorectal Cancer with Peritoneal Metastases: A Focus on Cytoreductive Surgery and Hyperthermic Intraperitoneal Chemotherapy
Youngbae Jeon, Eun Jung Park
The Ewha Medical Journal.2023;[Epub] CrossRef

Anal Adenocarcinoma Can Masquerade as Chronic Anal Fistula in Asians: Faith Qi-Hui Leong, Dedrick Kok Hong Chan, Ker-Kan Tan; Ann Coloproctol. 2019;35(1):47-49. Published online December 3, 2018; DOI: https://doi.org/10.3393/ac.2018.03.15

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6 Citations

Abstract PDF

Purpose
Perianal adenocarcinoma arising from a chronic anorectal fistula is a rare condition for which the natural history and optimal management are not well established. For that reason, we conducted a retrospective analysis of 5 consecutive patients with a perianal adenocarcinoma arising from a chronic anorectal fistula managed at our institution from January 2014 to December 2015.
Methods
The patients were identified from a prospectively collected colorectal cancer database that included all patients managed for colorectal cancer at our institution.
Results
The median age at diagnosis was 64 years (range, 55–72 years). Magnetic resonance imaging (MRI) was the initial investigation for all patients and showed a hyperintense T2-weighted image. One patient underwent an abdominoperineal resection following neoadjuvant chemoradiotherapy and remained disease free during the 12-month follow-up. Three patients received neoadjuvant therapy with intent for surgery, but did not undergo surgery due to either worsening health or metastatic spread. One patient declined intervention. The median overall survival was 10.5 months (range, 2–19 months).
Conclusion
A high index of suspicion is required to make a clinical diagnosis of an anal adenocarcinoma arising from a chronic fistula. Histologic diagnosis must be achieved to confirm the diagnosis. Multimodal therapy with neoadjuvant chemoradiotherapy followed by abdominoperineal resection is the treatment of choice.

Citations

Citations to this article as recorded by

Chronic fistula in ano associated with adenocarcinoma: a case report with a review of the literature
Nalini Kanta Ghosh, Ashok Kumar
Annals of Coloproctology.2024; 40(Suppl 1): S1. CrossRef
Value of apparent diffusion coefficient on MRI for prediction of histopathological type in anal fistula cancer
Shinji Yamamoto, Keiji Yonezawa, Naoki Fukata, Koji Takeshita, Makoto Kodama, Tetsuro Yamana, Shigeru Kiryu, Yukinori Okada
Medicine.2023; 102(14): e33281. CrossRef
Synchronous anal mucinous adenocarcinoma and anal tuberculosis presenting as chronic anal fistula: Challenging management
Sarah Benammi, Youness Bakali, Mouna Alaoui
Archive of Clinical Cases.2023; 10(2): 74. CrossRef
Non-mucinous adenocarcinomas and squamous cell carcinomas of the anal region masquerading as abscess or fistula: a retrospective analysis and systematic review of literature
Aysun Tekbaş, Henning Mothes, Utz Settmacher, Silke Schuele
Journal of Cancer Research and Clinical Oncology.2022; 148(6): 1509. CrossRef
Management and Outcomes in Anal Canal Adenocarcinomas—A Systematic Review
Vasilis Taliadoros, Henna Rafique, Shahnawaz Rasheed, Paris Tekkis, Christos Kontovounisios
Cancers.2022; 14(15): 3738. CrossRef
Adjuvant chemoradiotherapy does not improve outcomes in patients with fistula-associated anal adenocarcinoma undergoing abdominoperineal resection
Min Wang, Yu Xiang, Yunshan Wang, Jiayi Zhang, Haoran Zhao, Can Wang, Lichao Qiao, Bolin Yang
Frontiers in Oncology.2022;[Epub] CrossRef

Original Articles

Clinical Significance of Signet-Ring-Cell Colorectal Cancer as a Prognostic Factor: Sang-Oh Yun, Yong Beom Cho, Woo Yong Lee, Hee Cheol Kim, Seong Hyeon Yun, Yoon Ah Park, Jung Wook Huh; Ann Coloproctol. 2017;33(6):232-238. Published online December 31, 2017; DOI: https://doi.org/10.3393/ac.2017.33.6.232

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29 Citations

Abstract PDF

Purpose

The aim of this study is to evaluate the prognosis for patients with a signet-ring-cell carcinoma (SRCC) who undergo curative surgery by comparing them to patients with an adenocarcinoma (ADC), excluding a mucinous ADC.

Methods

Between September 1994 and December 2013, 14,110 patients with colorectal cancer underwent surgery and among them, 12,631 patients were enrolled in this study. 71 patients with a SRCC and 12,570 patients with a ADC were identified. We analyzed the disease-free survival and the overall survival rates before and after a 1:2 propensity score matching and evaluated those rates after stage stratification.

Results

The median follow-up durations were 48.5 months for the SRC group and 48.6 months for the ADC group. The disease-free survival rates and the overall survival rates were significantly lower in the SRC group before and after propensity score matching (P < 0.001). After stratification by stage, no differences were observed between the SRC and the ADC groups for the disease-free survival (DFS) and the overall survival (OS) rates for patients with cancer in its early stages (P = 0.913 and P = 0.380 for the DFS and the OS, respectively, in stages 0 and I, and P = 0.223 and P = 0.991 for the DFS and the OS, respectively, in stage II), but those rates were significantly lower in the SRC group for cancer in its later stages (P < 0.001, respectively in stages III and IV).

Conclusion

For cancer in advanced stages, patients with a resectable colorectal SRCC had a poorer prognosis after propensity score matching than those with an ADC did. Therefore, more intensive surveillance and closer observation should be offered to such patients.

Citations

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Meng-Han Tsai, Dariush Shahsavari, Jie Chen, Bobak Moazzami, Subbaramia Sridhar
Journal of Racial and Ethnic Health Disparities.2025;[Epub] CrossRef
Breaking Boundaries: An Unusual Case of Rectal Signet Ring Cell Carcinoma Invading the Uterus and Mesentery
Mitali Singh, Vaibhav Mane
Cureus.2025;[Epub] CrossRef
Prognostic implications of T stage in different pathological types of colorectal cancer: an observational study using SEER population-based data
Nan Yao, Wenqiang Li, Jiwei Wang, Hongyuan Chu, Ning Duan, Xinyu Niu, Guoyong Yu, Jun Qu
BMJ Open.2024; 14(2): e076579. CrossRef
Systematic review of risk factors, prognosis, and management of colorectal signet-ring cell carcinoma
Frederiek Nuytens, Vincent Drubay, Clarisse Eveno, Florence Renaud, Guillaume Piessen
World Journal of Gastrointestinal Oncology.2024; 16(5): 2141. CrossRef
Unraveling the complexities of colorectal cancer and its promising therapies – An updated review
Sayan Saha, Shreya Ghosh, Suman Ghosh, Sumit Nandi, Aditi Nayak
International Immunopharmacology.2024; 143: 113325. CrossRef
Case report: Preclinical efficacy of NEDD8 and proteasome inhibitors in patient-derived models of signet ring high-grade mucinous colorectal cancer from a Lynch syndrome patient
Erica Torchiaro, Consalvo Petti, Sabrina Arena, Francesco Sassi, Giorgia Migliardi, Alfredo Mellano, Roberta Porporato, Marco Basiricò, Loretta Gammaitoni, Enrico Berrino, Monica Montone, Giorgio Corti, Giovanni Crisafulli, Caterina Marchiò, Alberto Barde
Frontiers in Oncology.2023;[Epub] CrossRef
Prognosis of Different Histological Types in Patients with Stage II and III Colon Cancer
Yasmeen Z. Qwaider, Naomi M. Sell, Caitlin E. Stafford, Chloe Boudreau, Hiroko Kunitake, Robert N. Goldstone, Rocco Ricciardi, Liliana G. Bordeianou, Christy E. Cauley, David L. Berger
Journal of Gastrointestinal Surgery.2022; 26(2): 476. CrossRef
Tumor budding as a prognostic indicator in colorectal carcinoma: a retrospective study of primary colorectal carcinoma cases in a tertiary care center
Ashini H. Shah, Amisha J. Gami, Neetal H. Desai, Jahnavi S. Gandhi, Priti P. Trivedi
Indian Journal of Surgical Oncology.2022; 13(3): 459. CrossRef
The Association of Microbiome Dysbiosis With Colorectal Cancer
Artem Artemev, Sheetal Naik, Anastasia Pougno, Prasanna Honnavar, Nandan M Shanbhag
Cureus.2022;[Epub] CrossRef
Simple synthesis of WO3 based activated carbon co-doped CuS composites for photocatalytic applications
Tahir Iqbal, Maria Ashraf, Arslan Masood
Inorganic Chemistry Communications.2022; 139: 109322. CrossRef
Predictors of Long-Time Survivors in Nonmetastatic Colorectal Signet Ring Cell Carcinoma: A Large Population-Based Study
Wuguang Zhang, Wenqian Gong, Changhai Wu, Mengting Li, Xiaolong Tu, Stephen Fink
Gastroenterology Research and Practice.2022; 2022: 1. CrossRef
Applications of propensity score matching: a case series of articles published in Annals of Coloproctology
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Does signet ring cell carcinoma component signify worse outcomes for patients with colorectal cancer?
Liming Wang, Yasumitsu Hirano, Gregory Heng, Toshimasa Ishii, Hiroka Kondo, Kiyoka Hara, Nao Obara, Masahiro Asari, Takuya Kato, Shigeki Yamaguchi
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The Impact of Histologic Subtype on Receipt of Adjuvant Chemotherapy and Overall Survival in Stage III Colon Cancer: a Retrospective Cohort Analysis
Benjamin D. Powers, Seth I. Felder, Iman Imanirad, Sophie Dessureault, Sean P. Dineen
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Colorectal cancer of the young displays distinct features of aggressive tumor biology: A single-center cohort study
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Clinicopathological factors and survival outcomes of signet-ring cell and mucinous carcinoma versus adenocarcinoma of the colon and rectum: a systematic review and meta-analysis
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MRI features of signet ring rectal cancer
Meena Suthar, Akshay D. Baheti, Suman K. Ankathi, Amit Choudhari, Purvi D. Haria, Reena Engineer, Vikas Ostwal, Mukta S. Ramadwar, Ashwin Desouza, Avanish Saklani
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Clinicopathological Characteristics and Mutation Spectrum of Colorectal Adenocarcinoma With Mucinous Component in a Chinese Cohort: Comparison With Classical Adenocarcinoma
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Signet ring cell component in pretreatment biopsy predicts pathological response to preoperative chemoradiotherapy in rectal cancer
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Outcomes of Definitive Treatment of Signet Ring Cell Carcinoma of the Rectum: Is Minimal Invasive Surgery Detrimental in Signet Ring Rectal Cancers?
S. Raghavan, Deepak Kumar Singh, J. Rohila, A. DeSouza, R. Engineer, A. Ramaswamy, V. Ostwal, A. Saklani
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Aggressive Colorectal Cancer in the Young
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Is the Location of the Tumor Another Prognostic Factor for Patients With Colon Cancer?: Myung-Kyu Jung, Ui Sup Shin, Young-Jun Ki, Yong-Bae Kim, Sun-Mi Moon, Se-Jin Sung; Ann Coloproctol. 2017;33(6):210-218. Published online December 31, 2017; DOI: https://doi.org/10.3393/ac.2017.33.6.210

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Abstract PDF

Purpose

In this study, we investigated both the characteristics of right colon cancer (RTCC) in comparison with those of left colon cancer (LTCC) and the impact of the location of the colon cancer on the prognosis.

Methods

We retrospectively analyzed the cases of 974 patients with nonmetastatic colon cancer who had undergone surgery with a curative intent from January 2001 to December 2011. RTCC was defined as a tumor located proximal to the splenic flexure. The characteristics of RTCC cancer were investigated by using descriptive analyses, and their impacts on the prognosis were assessed by using a Cox multivariate regression.

Results

Compared to LTCC, RTCC showed a female-dominant feature, and an undifferentiated pathology was more frequently observed. The number of lymph nodes retrieved from patients with RTCC was significantly higher than that retrieved from patients with LTCC. During 75 months of follow-up, peritoneal recurrence was more common in patients with RTCC than it was in patients with LTCC, and among the patients with stage III colon cancer, the disease-free and the overall survival rates were significantly worse in patients with RTCC. After adjustments with the other prognostic factors associated with colon cancer had been made, a tumor located at the right colon was found to be independently associated with poor prognosis.

Conclusion

RTCC showed unique clinicopathologic features and was associated with a poorer prognosis.

Citations

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Ranbir Singh, Eshan Patel
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Zhenmeng Lin, Chunkang Yang, Yi Wang, Mingfang Yan, Huizhe Zheng
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The Prognostic Impact of Primary Tumor Site Differs According to the KRAS Mutational Status
Georgios Antonios Margonis, Neda Amini, Stefan Buettner, Yuhree Kim, Jaeyun Wang, Nikolaos Andreatos, Doris Wagner, Kazunari Sasaki, Andrea Beer, Carsten Kamphues, Daisuke Morioka, Inger Marie Løes, Katsunori Imai, Jin He, Timothy M. Pawlik, Klaus Kaczire
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Are right-sided colectomies for neoplastic disease at increased risk of primary postoperative ileus compared to left-sided colectomies? A coarsened exact matched analysis
Richard Garfinkle, Faisal Al-Rashid, Nancy Morin, Gabriela Ghitulescu, Julio Faria, Carol-Ann Vasilevsky, Marylise Boutros
Surgical Endoscopy.2020; 34(12): 5304. CrossRef
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Chuan-Wen Fan, Maria Kopsida, You-Bin Liu, Hong Zhang, Jing-Fang Gao, Gunnar Arbman, Si-Yu-Wei Cao, Yuan Li, Zong-Guang Zhou, Xiao-Feng Sun
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Indian Journal of Surgical Oncology.2020; 11(3): 372. CrossRef
Evaluating the distribution of the locations of colorectal cancer after appendectomy and cholecystectomy
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DinaO Helmy, MahmoudT El-Sabah Hussein, MohamedS Negm, MinaE Onsy
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Laterality: Right-Sided and Left-Sided Colon Cancer
Seong Kyu Baek
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Association of LCT-13910 C/T Polymorphism and Colorectal Cancer: Genco Gençdal, Esin Salman, Ömer Özütemiz, Ulus S. Akarca; Ann Coloproctol. 2017;33(5):169-172. Published online October 31, 2017; DOI: https://doi.org/10.3393/ac.2017.33.5.169

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Abstract PDF

Purpose

The activity of epithelial lactase (LCT) is associated with a polymorphism 13910 bp upstream in the lactase encoding gene. Because the association between the LCT-13910 polymorphism and the risk for colorectal cancer is not clear, we investigated the role of the LCT-13910 polymorphism as a potential risk factor for colorectal cancer and colorectal polyps in the Turkish population.

Methods

One hundred sixty-six subjects (74 with polyps, 44 with colorectal cancer, 48 controls), who had undergone a total colonoscopy between January 2012 and November 2012 in our endoscopy unit were genotyped for the LCT-13910 polymorphism by using the polymerase chain reaction and minisequencing.

Results

The CC genotype in the lactose gene 13910 locus, which is accepted as the genetic indicator of lactase deficiency, was determined as 83.7%. The CC genotype rate was determined as 89.1% in patients who had a history of lactose intolerance and 81.5% in those without a history of lactose intolerance (P = 0.236). No difference was detected between the patients who had colorectal polyp(s) and/or cancer and the controls with regard to the LCT-13910 polymorphism. No differences were determined between groups when they were compared with regard to the C or the T allele.

Conclusion

No differences were detected between the patients who had colorectal polyp(s) and/or cancer and those with normal colonoscopy findings with regard to lactase gene polymorphisms. No differences were determined between the groups when they were compared with regard to the C or the T allele.

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Genetically Determined Circulating Lactase/Phlorizin Hydrolase Concentrations and Risk of Colorectal Cancer: A Two-Sample Mendelian Randomization Study
Sihao Han, Jiemin Yao, Hajime Yamazaki, Samantha A. Streicher, Jianyu Rao, Roch A. Nianogo, Zuofeng Zhang, Brian Z. Huang
Nutrients.2024; 16(6): 808. CrossRef
The Association of Lactose Intolerance With Colon and Gastric Cancers: Friend or Foe?
Mohammad Maysara Asfari, Osama Hamid, Muhammad Talal Sarmini, Katherine Kendrick, Lakshmi Priyanka Pappoppula, Humberto Sifuentes, Subbaramiah Sridhar
Cureus.2022;[Epub] CrossRef
Genetically proxied milk consumption and risk of colorectal, bladder, breast, and prostate cancer: a two-sample Mendelian randomization study
Susanna C. Larsson, Amy M. Mason, Siddhartha Kar, Mathew Vithayathil, Paul Carter, John A. Baron, Karl Michaëlsson, Stephen Burgess
BMC Medicine.2020;[Epub] CrossRef
Routine disaccharidase testing: are we there yet?
Antone R. Opekun, Bruno P. Chumpitazi, Mustafa M. Abdulsada, Buford L. Nichols
Current Opinion in Gastroenterology.2020; 36(2): 101. CrossRef
Lactose Intolerance and Colorectal Cancer
Jong-Woo Kim
Annals of Coloproctology.2017; 33(5): 157. CrossRef

Anaphase-Promoting Complex 7 is a Prognostic Factor in Human Colorectal Cancer: Ik Yong Kim, Hye Yeon Kwon, Kwang Hwa Park, Dae Sung Kim; Ann Coloproctol. 2017;33(4):139-145. Published online August 31, 2017; DOI: https://doi.org/10.3393/ac.2017.33.4.139

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Abstract PDF

Purpose

The anaphase-promoting complex (APC) is a multiprotein complex with E3 ubiquitin ligase activity and is required for ubiquitination of securin and cyclin-B. Several APC-targeting molecules are reported to be oncogenes. Dysregulation of APC may be associated with tumorigenesis. This study examines the relationship between APC expression and clinicopathological factors and evaluates the possibility of an aberrant APC function in colorectal carcinomas (CRCs).

Methods

To determine whether the loss of APC7 expression is related to tumorigenesis, we used tissue micro-arrays in 114 resected CRCs to scrutinize the expressions of APC7 and Ki-67 immunohistochemistry and to find relations with clinocopathologic parameters. The expression of APC7 was defined as positive for summed scores of staining intensities from 0 to 3+.

Results

Forty-four cases (67.7%) of colon cancer and 38 cases (77.6%) of rectal cancer showed immunopositive reactions to APC. The grade of APC expression was not statistically correlated with tumor location, age, T or TNM stage, or differentiation. However, the expression of APC did correlate with the expression of Ki-67 and to the tumor recurrent. Higher APC expression showed the better 5-year overall survival rate in 74% of grades 2, 3 groups (high expression) than 57% of grades 0, 1 groups (lower expression) respectively (P = 0.042).

Conclusion

Positive APC expression may be a good prognostic factor for patients with CRC, and the loss of APC expression in tumor tissue may be related with the risk for recurrence and a poor survival rate compared to high APC expression. Further study of APC in controlling the cell cycle as aberrant function in CRC is needed.

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Microbiota as the unifying factor behind the hallmarks of cancer
Iva Benešová, Ľudmila Křížová, Miloslav Kverka
Journal of Cancer Research and Clinical Oncology.2023; 149(15): 14429. CrossRef
Upregulation of anaphase promoting complex (APC) 7 as a prognostic marker for esophageal squamous cell carcinoma: A hospital based study
Eyashin Ali, Manash Jyoti Kalita, Simanta Kalita, Jayasree Talukdar, Ankur Jyoti Deka, Jasmin Sultana, Bikash Narayan Choudhury, Munindra Narayan Baruah, Sahana Bhattacharjee, Subhash Medhi
Heliyon.2022; 8(6): e09722. CrossRef
Gatekeepers of the Gut: The Roles of Proteasomes at the Gastrointestinal Barrier
Gayatree Mohapatra, Avital Eisenberg-Lerner, Yifat Merbl
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Using BioPAX-Parser (BiP) to enrich lists of genes or proteins with pathway data
Giuseppe Agapito, Mario Cannataro
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Jacob L. Steenwyk, Dana A. Opulente, Jacek Kominek, Xing-Xing Shen, Xiaofan Zhou, Abigail L. Labella, Noah P. Bradley, Brandt F. Eichman, Neža Čadež, Diego Libkind, Jeremy DeVirgilio, Amanda Beth Hulfachor, Cletus P. Kurtzman, Chris Todd Hittinger, Antoni
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Marwa Matboli, Ayman E. Shafei, Sara H.A. Agwa, Sherif Sammir Elzahy, Ahmed K. Anwar, Amr R. Mansour, Ahmed I. Gaber, Ali E.A. Said, Paula Lwis, Marwa Hamdy
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Troy A. A. Harkness
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What is the Meaning of Anaphase-Promoting Complex 7 in Malignant Neoplasms?
Weon-Young Chang
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Prognostic Significance of Mucinous Histologic Subtype on Oncologic Outcomes in Patients With Colorectal Cancer: Sare Hosseini, Ali Mohammad Bananzadeh, Roham Salek, Mohammad Zare-Bandamiri, Ali Taghizadeh Kermani, Mohammad Mohammadianpanah; Ann Coloproctol. 2017;33(2):57-63. Published online April 28, 2017; DOI: https://doi.org/10.3393/ac.2017.33.2.57

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Abstract PDF

Purpose

Mucinous adenocarcinomas account for about 10% of all colorectal cancers. This study aimed to investigate the prognostic impact of mucinous histologic subtype on oncologic outcomes in patients with colorectal cancer.

Methods

This retrospective study was performed at two large tertiary university hospitals. We analyzed the characteristics, prognostic factors, and survival of patients with colorectal cancer who were treated and followed up between 2000 and 2013.

Results

Totally, 144 of 1,268 patients with a colorectal adenocarcinoma (11.4%) had mucinous histologic subtype. Statistically significant results found in this research are as follows: Mucinous histologic subtype tended to present in younger patients and to have larger tumor size, higher histologic grade, higher node stage, larger number of positive nodes, and higher rate of perineural invasion compared to nonmucinous histologic subtype. On the univariate analysis, mucinous subtype was a prognostic factor for disease-free and overall survival. On the multivariate analysis, primary tumor location, node stage and lymphatic-vascular invasion were independent prognostic factors for the local control rate. Rectal tumor location, higher disease stage, tumor grade II, and presence of lymphatic-vascular invasion had negative influences on disease-free survival, as did rectal tumor location, higher disease stage and presence of lymphatic-vascular invasion on overall survival.

Conclusion

Mucinous histologic subtype was associated with some adverse pathologic features in patients with colorectal cancer; however, it was not an independent prognostic factor for oncologic outcome.

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Association between lymphovascular invasion and lymph node metastases in colon cancer: A National Cancer Database analysis
Sameh Hany Emile, Nir Horesh, Zoe Garoufalia, Anjelli Wignakumar, Marylise Boutros, Steven D. Wexner
Colorectal Disease.2025;[Epub] CrossRef
Comprehensive Overview of Molecular, Imaging, and Therapeutic Challenges in Rectal Mucinous Adenocarcinoma
Mihaela Berar, Andra Ciocan, Emil Moiș, Luminița Furcea, Călin Popa, Răzvan Alexandru Ciocan, Florin Zaharie, Cosmin Puia, Nadim Al Hajjar, Cosmin Caraiani, Ioana Rusu, Florin Graur
International Journal of Molecular Sciences.2025; 26(2): 432. CrossRef
Clinicopathological and prognostic features of colorectal mucinous adenocarcinomas: a systematic review and meta-analysis
Xiao Wang, Haoran Wang, Haoqing He, Kai Lv, Wenguang Yuan, Jingbo Chen, Hui Yang
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Multi gene mutation signatures in colorectal cancer patients: predict for the diagnosis, pathological classification, staging and prognosis
Yan Zhuang, Hailong Wang, Da Jiang, Ying Li, Lixia Feng, Caijuan Tian, Mingyu Pu, Xiaowei Wang, Jiangyan Zhang, Yuanjing Hu, Pengfei Liu
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Clinicopathological Features and Survival of Signet-Ring Cell Carcinoma and Mucinous Adenocarcinoma of Right Colon, Left Colon, and Rectum
Lili Zhu, Chunrun Ling, Tao Xu, Jinglin Zhang, Yujie Zhang, Yingjie Liu, Chao Fang, Lie Yang, Wen Zhuang, Rui Wang, Jie Ping, Mojin Wang
Pathology and Oncology Research.2021;[Epub] CrossRef
Identification of Potential Biomarkers and Biological Pathways for Poor Clinical Outcome in Mucinous Colorectal Adenocarcinoma
Chang Woo Kim, Jae Myung Cha, Min Seob Kwak
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Clinical significance of mucinous component in colorectal adenocarcinoma: a propensity score-matched study
Chuanwang Yan, Hui Yang, Lili Chen, Ran Liu, Wei Shang, Wenguang Yuan, Fei Yang, Qing Sun, Lijian Xia
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Yizhi Ge, Shijun Lei, Bo Cai, Xiang Gao, Guobin Wang, Lin Wang, Zheng Wang
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Chun‑Chao Chang, Kuo‑Ching Chao, Chi‑Jung Huang, Chih‑Sheng Hung, Yen‑Chieh Wang
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Heita Ozawa, Shinichi Yamauchi, Hiroki Nakanishi, Junichi Sakamoto, Shin Fujita, Kenichi Sugihara
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Predictive Significance of Mucinous Histology on Pathologic Complete Response Rate Following Capecitabine-Based Neoadjuvant Chemoradiation in Rectal Cancer: a Comparative Study
Sare Hosseini, NamPhong Nguyen, Mohammad Mohammadianpanah, Sepideh Mirzaei, Ali Mohammad Bananzadeh
Journal of Gastrointestinal Cancer.2019; 50(4): 716. CrossRef
Impact of histological subtype on the prognosis of patients undergoing surgery for colon cancer
Fabio Bagante, Gaya Spolverato, Eliza Beal, Katiuscha Merath, Qinyu Chen, Ozgür Akgül, Robert A. Anders, Timothy M. Pawlik
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SCF/c-KIT Signaling Increased Mucin2 Production by Maintaining Atoh1 Expression in Mucinous Colorectal Adenocarcinoma
Ping Shen, Shu Yang, Haimei Sun, Guilan Li, Bo Wu, Fengqing Ji, Tingyi Sun, Deshan Zhou
International Journal of Molecular Sciences.2018; 19(5): 1541. CrossRef
Mucinous Subtype in Patients With Colorectal Cancer
Hyung Jin Kim
Annals of Coloproctology.2017; 33(2): 44. CrossRef

Case Report

Synchronous Primary Anorectal Melanoma and Sigmoid Adenocarcinoma: Inju Cho, Kyung Jong Kim, Sung-Chul Lim; Ann Coloproctol. 2016;32(5):190-194. Published online October 31, 2016; DOI: https://doi.org/10.3393/ac.2016.32.5.190

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Abstract PDF

A primary anorectal malignant melanoma is a rare tumor. Moreover, cases involving a synchronous anorectal melanoma and colon adenocarcinoma are extremely rare. The authors report a case of a synchronous anorectal melanoma and sigmoid adenocarcinoma in an 84-year-old man. The regions of the anorectal melanoma showed melanocytic nevi in the adjacent mucosa of the anal canal and rectum. A dysplastic nevus was also identified in the anal mucosa. This case demonstrates that an anorectal melanoma can arise from pre-existing anorectal melanocytic lesions.

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Giovanni Paolino, Antonio Podo Brunetti, Carolina De Rosa, Carmen Cantisani, Franco Rongioletti, Andrea Carugno, Nicola Zerbinati, Mario Valenti, Domenico Mascagni, Giulio Tosti, Santo Raffaele Mercuri, Riccardo Pampena
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Endoscopic diagnosis of gastrointestinal melanoma
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Original Articles

Efficacy and Safety of Low-Dose-Rate Endorectal Brachytherapy as a Boost to Neoadjuvant Chemoradiation in the Treatment of Locally Advanced Distal Rectal Cancer: A Phase-II Clinical Trial: Shapour Omidvari, Shadi Zohourinia, Mansour Ansari, Leila Ghahramani, Mohammad Zare-Bandamiri, Ahmad Mosalaei, Niloofar Ahmadloo, Saeedeh Pourahmad, Hamid Nasrolahi, Sayed Hasan Hamedi, Mohammad Mohammadianpanah; Ann Coloproctol. 2015;31(4):123-130. Published online August 31, 2015; DOI: https://doi.org/10.3393/ac.2015.31.4.123

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Abstract PDF

Purpose

Despite advances in rectal cancer treatment over the last decade, local control and risk of late side effects due to external beam radiation therapy (EBRT) remain as concerns. The present study aimed to investigate the efficacy and the safety of low-dose-rate endorectal brachytherapy (LDRBT) as a boost to neoadjuvant chemoradiation for use in treating locally advanced distal rectal adenocarcinomas.

Methods

This phase-II clinical trial included 34 patients (as the study arm) with newly diagnosed, locally advanced (clinical T3-T4 and/or N1/N2, M0) lower rectal cancer. For comparative analysis, 102 matched patients (as the historical control arm) with rectal cancer were also selected. All the patients were treated with LDRBT (15 Gy in 3 fractions) and concurrent chemoradiation (45-50.4 Gy). Concurrent chemotherapy consisted of oxaliplatin 130 mg/m² intravenously on day 1 plus oral capecitabine 825 mg/m² twice daily during LDRBT and EBRT.

Results

The study results revealed a significant differences between the study arm and the control arm in terms in the pathologic tumor size (2.1 cm vs. 3.6 cm, P = 0.001), the pathologic tumor stage (35% T3-4 vs. 65% T3-4, P = 0.003), and the pathologic complete response (29.4% vs. 11.7%, P < 0.028). Moreover, a significantly higher dose of EBRT (P = 0.041) was found in the control arm, and a longer time to surgery was observed in the study arm (P < 0.001). The higher rate of treatment-related toxicities, such as mild proctitis and anemia, in the study arm was tolerable and easily manageable.

Conclusion

A boost of LDRBT can optimize the pathologic complete response, with acceptable toxicities, in patients with distal rectal cancer.

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Eliya Farah, Matthew Kenney, Matthew T. Warkentin, Winson Y. Cheung, Darren R. Brenner
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Brachytherapy of rectal cancer: comparative characteristics of techniques (review)
Roman V. Novikov, Sergey N. Novikov
Koloproktologia.2023; 22(3): 158. CrossRef
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N. Hearn, D. Atwell, K. Cahill, J. Elks, D. Vignarajah, J. Lagopoulos, M. Min
Clinical Oncology.2021; 33(1): e1. CrossRef
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Zahra Siavashpour, Farzad Taghizadeh-Hesary, Afshin Rakhsha
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F. Roeder, E. Meldolesi, S. Gerum, V. Valentini, C. Rödel
Radiation Oncology.2020;[Epub] CrossRef
Predictive Significance of Mucinous Histology on Pathologic Complete Response Rate Following Capecitabine-Based Neoadjuvant Chemoradiation in Rectal Cancer: a Comparative Study
Sare Hosseini, NamPhong Nguyen, Mohammad Mohammadianpanah, Sepideh Mirzaei, Ali Mohammad Bananzadeh
Journal of Gastrointestinal Cancer.2019; 50(4): 716. CrossRef
A systematic review comparing radiation toxicity after various endorectal techniques
An-Sofie Verrijssen, Thirza Opbroek, Murillo Bellezzo, Gabriel P. Fonseca, Frank Verhaegen, Jean-Pierre Gerard, Arthur Sun Myint, Evert J. Van Limbergen, Maaike Berbee
Brachytherapy.2019; 18(1): 71. CrossRef
Is the Pathologic Response of T3 Rectal Cancer to High-Dose-Rate Endorectal Brachytherapy Comparable to External Beam Radiotherapy?
Richard Garfinkle, Sebastian Lachance, Te Vuong, Alexandre Mikhail, Vincent Pelsser, Adrian Gologan, Nancy A. Morin, Carol-Ann Vasilevsky, Marylise Boutros
Diseases of the Colon & Rectum.2019; 62(3): 294. CrossRef
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Mark T.W. Teo, Lucy McParland, Ane L. Appelt, David Sebag-Montefiore
International Journal of Radiation Oncology*Biology*Physics.2018; 100(1): 146. CrossRef
Colorectal Cancer Staging Using Three Clustering Methods Based on Preoperative Clinical Findings
Saeedeh Pourahmad, Soudabeh Pourhashemi, Mohammad Mohammadianpanah
Asian Pacific Journal of Cancer Prevention.2016; 17(2): 823. CrossRef
Lentivirus‐mediated shRNA interference of ghrelin receptor blocks proliferation in the colorectal cancer cells
An Liu, Chenggang Huang, Jia Xu, Xuehong Cai
Cancer Medicine.2016; 5(9): 2417. CrossRef
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Seung Hyuk Baik
Annals of Coloproctology.2015; 31(4): 115. CrossRef

Colovesical Fistula: Should It Be Considered a Single Disease?: Qamar Hafeez Kiani, Mark L. George, Emin A. Carapeti, Alexis M. P. Schizas, Andrew B. Williams; Ann Coloproctol. 2015;31(2):57-62. Published online April 30, 2015; DOI: https://doi.org/10.3393/ac.2015.31.2.57

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Abstract PDF

Purpose

This research was conducted to compare the management and the outcome of patients with colovesical fistulae of different aetiologies.

Methods

Retrospective data were collected from 2002 to 2012 and analyzed with SPSS ver. 17. Age, gender, aetiology, management, hospital stay, postoperative complications, and mortality were studied and compared among colovesical fistulae of different aetiologies.

Results

A total of 55 patients, 46 males (84%) and 9 females (16%), with a median age of 65 years (interquartile range [IQR], 48-75 years) were studied. Diverticular disease was the most common benign cause and recto-sigmoid cancer the most common malignancy. Anterior resection and bladder repair were the most frequent operations in benign cases, as was total pelvic exenteration in the malignant group. Multiple intestinal loop involvement and subsequent resection were significantly higher in those with Crohn disease than it was in patients of colovesical fistula due to all other causes collectively (60% vs. 6%, P = 0.006). Patients with malignancy had a higher postoperative complication rate than patients who did not (12 [80%] vs. 7 [32%], P = 0.0005). Pelvic collection (11, 22%) was the most frequent early complication (predominantly in the malignant group) whereas incisional hernia (8, 22%) was the most common late complication, with a predominance in the benign group. The median hospital stay was significantly prolonged in the malignant group (32 days; IQR, 17-70 days vs. 16 days; IQR, 11-25 days; P < 0.001).

Conclusion

Despite their having similar clinical presentation, colovesical fistulae of various aetiologies differ significantly in management and outcome.

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Davide Campobasso, Maurizio Zizzo, Federico Biolchini, Carolina Castro-Ruiz, Antonio Frattini, Alessandro Giunta
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Goro Takahashi, Akihisa Matsuda, Takeshi Yamada, Kay Uehara, Seiichi Shinji, Yasuyuki Yokoyama, Takuma Iwai, Kohki Takeda, Sho Kuriyama, Toshimitsu Miyasaka, Shintaro Kanaka, Tai Terayachi, Tetsuya Okino, Hiroshi Yoshida
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Clinicopathologic Significance of BRAF Mutation and Extracellular Signal Regulated Kinase 1/2 Expression in Patients With a Colorectal Adenocarcinoma: Hyung Ook Kim, Beom Gyu Kim, Seong Jae Cha, Yong Gum Park, Tae Jin Lee; Ann Coloproctol. 2015;31(1):9-15. Published online February 28, 2015; DOI: https://doi.org/10.3393/ac.2015.31.1.9

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Abstract PDF

Purpose

BRAF mutation and expression of extracellular signal regulated kinase (ERK) are linked with colorectal carcinogenesis through the serrated pathway. BRAF and ERK1/2 play important roles in the activation of mitogen-activated protein (MAP) kinase signaling pathways. The present study investigated the clinicopathologic outcomes of BRAF mutation and ERK1/2 expression in patients with colorectal cancer (CRC) and the possibility of using them as prognostic indicators.

Methods

Dual-priming oligonucleotide-based multiplex polymerase chain reaction for BRAF^V600E mutation and immunohistochemical analysis of ERK1/2 were performed using 65 formalin-fixed, paraffin-embedded samples from patients with CRC. We analyzed the dependences of the clinicopathologic features on BRAF mutation and ERK1/2 expression.

Results

Out of 65 samples from CRC patients, BRAF mutation was detected in 3 (4.6%). The 3 patients with BRAF mutation presented with T3 CRC with lymph node metastasis (stage III) showing moderately or poorly differentiated histology. ERK1 and ERK2 were positively detected in 73.8% and 15.4% of the patients with CRC, respectively. ERK1 expression was significantly correlated with lymph node metastasis (P = 0.049). ERK2 expression was significantly correlated with tumor emboli (P < 0.05), tumor invasion (P = 0.035), lymph node metastasis (P = 0.017), and stage (P = 0.02).

Conclusion

BRAF mutation and ERK1/2 expression may be associated with advanced or more aggressive CRC. These molecular markers might play prognostic roles in CRC developed through the serrated pathway.

Citations

Citations to this article as recorded by

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Annals of Coloproctology.2015; 31(1): 1. CrossRef

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