An astute Surgeon skilled in Endoscopy, Minimally Invasive Surgery, Colorectal and Hernia surgeries. with a Bachelor of Medicine, Bachelor of Surgery - MBBS from the University of Nigeria, Nsukka and post-graduate surgery training acquired in India, Europe and the US. He has had a faculty position in the Department of Surgery, Faculty of Health Sciences University of Port Harcourt Nigeria since 2011 and is currently a Professor of Minimal Access Surgery in addition to being an Honorary Consultant Surgeon at the University of Port Harcourt Teaching Hospital Port Harcourt Rivers State Nigeria. He recently completed a 1- year Research Fellowship in the Colorectal Surgery department of Ellen Leifer and Steven Shulman Digestive Disease Center Cleveland Clinic Florida USA.
Professor Ray-Offor is a surgeon educator, and has organized multiple workshops for training in Endoscopy/Minimal Access Surgery; a seasoned author with over 80 abstracts and peer-reviewed journal publications in addition to being the editor of two books. He is a member of the Editorial Board of the Nigerian Journal of Gastroenterology and Hepatology, a reviewer of multiple scientific journals and a member of several professional societies in Africa, Europe, Asia and North America. These include the West African College of Surgeons WACS, the Society of Gastroenterology and Hepatology SOGHIN, the Nigerian Society for Colorectal Disorders, European Association of Endoscopic Surgeons EAES, World Association of Laparoscopic Surgeons WALS, American College of Surgeons ACS, Society of American Gastrointestinal Endoscopic Surgeons SAGES, and American Society of Colon and Rectal Surgeons ASCRS.
He is the founder of Oak Endoscopy Centre & Radiodiagnostics Port Harcourt Nigeria- a non-profit organization for advancing Endoscopy and MIS.
His main professional and scientific interests focus on gastrointestinal endoscopy, minimally invasive general/ colorectal surgery, and colorectal cancer.
Selected publications from PubMed
Perineal salvage surgery for prolapse of ileal pouch anal anastomosis: Systematic review and meta-analysis.
Ray-Offor E, Garoufalia Z, Emile SH, Rogers P, Horesh N, Gefen R, Zhou P, DaSilva G, Strassmann V, Wexner SD
Colorectal Dis. 2025 Sep;27(9):e70202 doi: 10.1111/codi.70202.
Heterogeneity in survival within age groups of early-onset colorectal cancer patients: A National Cancer Database analysis.
Ray-Offor E, Garoufalia Z, Emile SH, Horesh N, da Silva G, Wexner S
J Surg Oncol. 2024 Sep;130(3):622-636 doi: 10.1002/jso.27754.
Trans‑anal minimally invasive surgery (TAMIS) versus rigid platforms for local excision of early rectal cancer: a systematic review and meta-analysis of the literature.
Garoufalia Z, Rogers P, Meknarit S, Mavrantonis S, Aeschbacher P, Ray-Offor E, Emile SH, Gefen R, Dourado J, Horesh N, Wexner SD
Surg Endosc. 2024 Aug;38(8):4198-4206 doi: 10.1007/s00464-024-11065-6.
Effect of neoadjuvant therapy regimens on lymph nodes yield in rectal cancer.
Ray-Offor E, Nagarajan A, Horesh N, Emile SH, Gefen R, Garoufalia Z, Dourado J, Parlade A, Da Silva G, Wexner S
J Surg Oncol. 2024 Jul;130(1):125-132 doi: 10.1002/jso.27675.
Outcomes of Early Versus Standard Closure of Diverting Ileostomy After Proctectomy: Meta-analysis and Meta-regression Analysis of Randomized Controlled Trials.
Emile SH, Horesh N, Garoufalia Z, Gefen R, Ray-Offor E, Wexner SD
Ann Surg. 2024 Apr 1;279(4):613-619 doi: 10.1097/SLA.0000000000006109.
An astute Surgeon skilled in Endoscopy, Minimally Invasive Surgery, Colorectal and Hernia surgeries. with a Bachelor of Medicine, Bachelor of Surgery - MBBS from the University of Nigeria, Nsukka and post-graduate surgery training acquired in India, Europe and the US. He has had a faculty position in the Department of Surgery, Faculty of Health Sciences University of Port Harcourt Nigeria since 2011 and is currently a Professor of Minimal Access Surgery in addition to being an Honorary Consultant Surgeon at the University of Port Harcourt Teaching Hospital Port Harcourt Rivers State Nigeria. He recently completed a 1- year Research Fellowship in the Colorectal Surgery department of Ellen Leifer and Steven Shulman Digestive Disease Center Cleveland Clinic Florida USA. Professor Ray-Offor is a surgeon educator, and has organized multiple workshops for training in Endoscopy/Minimal Access Surgery; a seasoned author with over 80 abstracts and peer-reviewed journal publications in addition to being the editor of two books. He is a member of the Editorial Board of the Nigerian Journal of Gastroenterology and Hepatology, a reviewer of multiple scientific journals and a member of several professional societies in Africa, Europe, Asia and North America. These include the West African College of Surgeons WACS, the Society of Gastroenterology and Hepatology SOGHIN, the Nigerian Society for Colorectal Disorders, European Association of Endoscopic Surgeons EAES, World Association of Laparoscopic Surgeons WALS, American College of Surgeons ACS, Society of American Gastrointestinal Endoscopic Surgeons SAGES, and American Society of Colon and Rectal Surgeons ASCRS. He is the founder of Oak Endoscopy Centre & Radiodiagnostics Port Harcourt Nigeria- a non-profit organization for advancing Endoscopy and MIS. His main professional and scientific interests focus on gastrointestinal endoscopy, minimally invasive general/ colorectal surgery, and colorectal cancer.
With Nigerian Society for Colorectal Disorders
Published
Jan 2026
An astute Surgeon skilled in Endoscopy, Minimally Invasive Surgery, Colorectal and Hernia surgeries. with a Bachelor of Medicine, Bachelor of Surgery - MBBS from the University of Nigeria, Nsukka and post-graduate surgery training acquired in India, Europe and the US. He has had a faculty position in the Department of Surgery, Faculty of Health Sciences University of Port Harcourt Nigeria since 2011 and is currently a Professor of Minimal Access Surgery in addition to being an Honorary Consultant Surgeon at the University of Port Harcourt Teaching Hospital Port Harcourt Rivers State Nigeria. He recently completed a 1- year Research Fellowship in the Colorectal Surgery department of Ellen Leifer and Steven Shulman Digestive Disease Center Cleveland Clinic Florida USA. Professor Ray-Offor is a surgeon educator, and has organized multiple workshops for training in Endoscopy/Minimal Access Surgery; a seasoned author with over 80 abstracts and peer-reviewed journal publications in addition to being the editor of two books. He is a member of the Editorial Board of the Nigerian Journal of Gastroenterology and Hepatology, a reviewer of multiple scientific journals and a member of several professional societies in Africa, Europe, Asia and North America. These include the West African College of Surgeons WACS, the Society of Gastroenterology and Hepatology SOGHIN, the Nigerian Society for Colorectal Disorders, European Association of Endoscopic Surgeons EAES, World Association of Laparoscopic Surgeons WALS, American College of Surgeons ACS, Society of American Gastrointestinal Endoscopic Surgeons SAGES, and American Society of Colon and Rectal Surgeons ASCRS. He is the founder of Oak Endoscopy Centre & Radiodiagnostics Port Harcourt Nigeria- a non-profit organization for advancing Endoscopy and MIS. His main professional and scientific interests focus on gastrointestinal endoscopy, minimally invasive general/ colorectal surgery, and colorectal cancer.
Published
Jan 2024
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