[Non-tuberculous abscesses of the psoas. A case of apparently primary abscess of the psoas due to Staphylococcus aureus].

Abscess of the psoas, which is a well recognized complication in tuberculous osteoarticular infections, can also occur in certain regional diseases of the bones or viscera: common germ osteitis, diverticulosis, colic cancer, appendicitis and, above all, Crohn disease. Abscess of the psoas can also present as an apparently primary pyogenic muscular infection. A case is reported of an abscess of the psoas due to Staphylococcus aureus, which occurred spontaneously in an apparently healthy 50-year-old woman, was cured by surgical drainage, and whose course confirmed its primary nature.