Dr. Rainer Porschen

Medical Degrees

• Medical Graduation — National University of Aachen (RWTH Aachen), Germany, 1973
• Doctorate (Dr. med.) — Institute of Medicine, Nuclear Research Center Jülich, Germany, 1980
• Specialist (Facharzt) in Internal Medicine — Germany
• Subspecialist qualification in Gastroenterology — Germany
• Professorship — Germany

Fellowships & Special Training

• Research Associate, Department of Gastroenterology — Heinrich Heine University, Düsseldorf, Germany, 1984
• Researcher, Hematology Department — MD Anderson Cancer Institute, Houston, USA, 1987
• Lead Coordinator (Federführung / Verfasser) — German national clinical guidelines for colorectal cancer and oesophageal cancer
• Co-founder — Interdisciplinary Bowel Cancer Centre (Darmzentrum Bremen) with Prof. Ivo Baca

Certifications & Accreditations

• German Medical Association — Board Certified Specialist in Internal Medicine and Gastroenterology
• Member, multiple German medical societies for the treatment of rectum and colon cancer, ulcerative colitis, pancreatic cancer, Barrett's syndrome, and reflux disease
• Society of Digestive Tract Diseases — Past President

Current Affiliation

• Director, Clinic for Internal Medicine — Klinikum Bremen-Ost, Züricher Str. 40, 28325 Bremen, Germany (since 2000 — 25+ years)

Past Affiliations

• Hematology Department, MD Anderson Cancer Institute, Houston, USA — Researcher, 1987
• Department of Gastroenterology, Heinrich Heine University, Düsseldorf, Germany — Research Associate, 1984
• University of Tübingen — Department of Gastroenterology (collaborator)
• Municipal Hospital Dortmund — Medical Department (collaborator)
• Institute of Medicine, Nuclear Research Center Jülich — Doctoral Trainee, 1980
• National University of Aachen (RWTH Aachen) — Medical Trainee, 1968–1973

Academic & Research Roles

• Lead Author (Verfasser / Federführung) — German national clinical guideline for diagnosis and treatment of colorectal cancer
• Co-author / contributor — German guidelines for oesophageal cancer
• Co-founder — Interdisciplinary Darmzentrum Bremen (Bremen Bowel Cancer Centre) with Prof. Ivo Baca
• Past President — Society of Digestive Tract Diseases
• Active speaker at national and international gastroenterology and oncology conferences

Key Achievements

• 37+ years of gastroenterology and gastrointestinal oncology experience
• Top 100 doctors of Germany — FOCUS magazine
• Best-rated gastroenterologist in Europe (FOCUS rating)
• Lead author of German national colorectal cancer guideline
• Director, Clinic for Internal Medicine, Klinikum Bremen-Ost since 2000
• Principal investigator of landmark adjCCA-01 colon cancer trial published in J Clin Oncol