Forrest Classification

Estimate risk of re-bleeding post-endoscopy for upper GI bleeding.

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1.Type of Lesion?
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1. Type of Lesion?

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About this Calculator

Endoscopic signs indicating risk of rebleeding were first classifed in 1974 by Forrest et al. Peptic ulcer disease is the most common cause of upper gastrointestinal bleeding and endoscopic findings can give valuable information about risk of rebleeding after hospital admission. The Forrest classification risk of rebleeding is based on an untreated lesion.


Forrest JA, Finlayson ND, Shearman DJ.

Endoscopy in gastrointestinal bleeding.

Lancet 1974 August 17, 2 (7877): 394-7

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