title: A 21-year-old man with pain and swelling of the right hand.
abstract: The following case is presented to illustrate the roentgenographic and clinical findings of a condition of interest to the orthopaedic surgeon. Initial history, physical findings, and roentgenographic examinations are found on this page. The final clinical and roentgenographic differential diagnoses are presented on the following pages.
authors.affiliation: Beijing Ji Shui Tan Hospital, Beijing Institute of Traumatology and Orthopaedics, People's Republic of China.
authors.forename: Y
authors.initials: Y
authors.lastname: Yin
authors.forename: M B
authors.initials: MB
authors.lastname: Rotman
authors.forename: L A
authors.initials: LA
authors.lastname: Gilula
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D005592:Fracture Fixation; D050723:Fractures, Bone / Q000150:complications / Q000000981:diagnostic imaging* / Q000601:surgery; D006801:Humans; D004204:Joint Dislocations / Q000150:complications / Q000000981:diagnostic imaging* / Q000601:surgery; D008297:Male; D008662:Metacarpophalangeal Joint / Q000000981:diagnostic imaging* / Q000293:injuries / Q000601:surgery; D010146:Pain / Q000209:etiology; D014057:Tomography, X-Ray Computed