[A 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) ( MSH )]
UMLS (CSP) C0016167 - Acquired Abnormality
- Disease or Syndrome
Relation/PAR: anal disorder