title: Multiple-crystal acute polyarthritis.
abstract: A patient with acute polyarthritis due to crystal-positive simultaneous gout and pseudogout affecting different joints is described. The case emphasises the importance of aspirating more than one involved joint and carefully searching for crystals in patients with acute arthritis involving 2 or more joints, particular those in whom the diagnosis of multiple crystalline joint disease is considered.
mesh_terms: D000208:Acute Disease; D000368:Aged; D001168:Arthritis / Q000209:etiology*; D002805:Chondrocalcinosis / Q000150:complications; D005260:Female; D006073:Gout / Q000150:complications; D006801:Humans