title: Calculocutaneous sinus.
abstract: Extrusion of a urinary calculus is a rare occurrence, and to date only 7 cases have been previously documented. Three patients are described, all of whom had a persistent discharging calculocutaneous sinus as a manifestation of the extruded calculus. The 3 cases had similar features of presentation with a perinephric abscess, a staghorn calculus within a nonfunctioning kidney, and a classic radiologic feature of a portion of calculus clearly distinct from the main bulk of the stone.
mesh_terms: D000038:Abscess / Q000209:etiology / Q000628:therapy; D000368:Aged; D004322:Drainage; D005260:Female; D006801:Humans; D007669:Kidney Calculi / Q000150:complications* / Q000000981:diagnostic imaging; D007674:Kidney Diseases / Q000209:etiology*; D008875:Middle Aged; D011859:Radiography; D014548:Urinary Fistula / Q000209:etiology*