Hackensack Gastroenterology: Colonic adenomas detected by 18F-FDG PET

Colonic adenomas detected by 18F-FDG PETA 79-year-old man with cutaneous T-cell lymphoma underwent whole body 18F-fluorodeoxyglucose positron emission tomography (18F-FDG PET) for staging purposes. He did not have abdominal pain, alteration in bowel habit, or rectal bleeding. CT of the abdomen and pelvis was negative. The 18F-FDG PET disclosed an intense focus of abnormally increased metabolism in the pelvis, posterior to the bladder, corresponding anatomically to the rectum (A), the examination being otherwise normal. Colonoscopy demonstrated a 2.0 × 1.8 × 1.5 cm pedunculated tubulovillous adenoma in the rectum (B).

A 73-year-old woman with a large cell carcinoma in the right upper lobe of the lung underwent whole body 18F-FDG PET. She had no abdominal pain, alteration in bowel habit, or rectal bleeding. 18F-FDG PET demonstrated an intense focus of abnormally increased metabolism in the right upper lobe, corresponding to the lung carcinoma. A second intense focus of abnormally increased metabolism was also noted in the pelvis, posterior to the bladder, corresponding anatomically to the rectum

(C). At colonoscopy, a 2.6 × 1.6 × 1.4 cm pedunculated tubulovillous adenoma was found in the rectum (D).

David M. Felig, MD, Ali Sedarat, MD, Harry Agress Jr., MD, Stanley E. Waintraub, MD
Hackensack University Medical Center, Hackensack, NJ

Published in issue: Gastrointestinal Endoscopy, Volume 56, Issue 5, Page 734, November 2002