definitionA painful linear ulcer at the margin of the anus. It appears as a crack or slit in the mucous membrane of the anus and is very painful and difficult to heal. (Dorland, 27th ed & Stedman, 25th ed) |
UMLSAnal Fissure, Anal Fissures, Anal Ulcer, ANAL ULCERATION, Anal Ulcers, ANUS, FISSURE, Fissure in Ano, Fissure, anal, Fissured, anal, Fissure-in-ano, Fissures, Anal, Nontraumatic tear of anus, Ulcer, Anal, Ulcers, Anal |
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