title: Ultrasonography is useful to distinguish between intra- and extra-articular disease in pyoderma gangrenosum complicating polyarthritis.
authors.forename: P M
authors.initials: PM
authors.lastname: Houtman
authors.forename: E N
authors.initials: EN
authors.lastname: Griep
mesh_terms: D000368:Aged; D001168:Arthritis / Q000150:complications / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D017511:Pyoderma Gangrenosum / Q000150:complications / Q000000981:diagnostic imaging*; D014463:Ultrasonography