Blumer's shelf

System: Abdominal & Digestive Signs · All abdominal & digestive signs

What it is — and how it is elicited

A firm, shelf-like mass felt on rectal examination, in the pouch in front of the rectum.

What a positive finding suggests

Associated with metastatic deposits from an abdominal cancer, classically of the stomach, seeding the pelvic peritoneum.

◈ Behind the name

George Blumer (1872–1962), American physician.

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Please note: This page is an educational reference about clinical examination signs. A clinical sign supports — and never replaces — a full clinical evaluation, examination and appropriate testing. A sign being present does not by itself prove a diagnosis, and an absent sign does not rule one out. If you have symptoms that worry you, see a health professional.