title: Appendicitis presenting as a swollen thigh.
abstract: A case of acute appendicitis presenting as an abscess in the thigh with associated gas is described. The tracking of the pus down the psoas muscle is stressed, and its association with the psoas sign is noted.
mesh_terms: D000038:Abscess / Q000209:etiology*; D001064:Appendicitis / Q000150:complications*; D006801:Humans; D008297:Male; D008875:Middle Aged; D013848:Thigh