title: Fracture of the ulnar sesamoid of the metacarpophalangeal joint of the thumb: a case report.
abstract: Fracture of the thumb sesamoid bones is rare. We report here a fracture of the ulnar sesamoid in a 25-year-old man caused by a fall on his outstretched hand. He complained of pain and loss of thumb motion. Physical examination revealed tenderness, swelling, and a hematoma over the first metacarpal joint of the right thumb. Radiographs showed a fracture of the ulnar sesamoid which should not be confused with normal variants that occasionally arise from ossifications centers that fail to unite.
authors.affiliation: Department of Orthopaedics and Traumatology, Meyan Hospital, Istanbul, Türkiye.
authors.forename: M
authors.initials: M
authors.lastname: Altun
authors.forename: H
authors.initials: H
authors.lastname: Erdil
authors.forename: H
authors.initials: H
authors.lastname: Sahin
authors.forename: E
authors.initials: E
authors.lastname: Gumuşburun
mesh_terms: D000058:Accidental Falls; D000328:Adult; D006801:Humans; D008297:Male; D008662:Metacarpophalangeal Joint / Q000000981:diagnostic imaging / Q000293:injuries*; D011859:Radiography; D012716:Sesamoid Bones / Q000000981:diagnostic imaging / Q000293:injuries*; D013933:Thumb / Q000000981:diagnostic imaging / Q000293:injuries*; D014458:Ulna Fractures