title: A 32-year-old woman with pain and swelling at the base of her thumb.
abstract: The following case is presented to illustrate the roentgenographic and clinical findings of a condition of interest to the orthopedic surgeon. Initial history, physical findings, and roentgenographic examinations are found on the first 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: Z
authors.initials: Z
authors.lastname: Yang
authors.forename: L A
authors.initials: LA
authors.lastname: Gilula
authors.forename: N H
authors.initials: NH
authors.lastname: Naam
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D005384:Finger Joint; D006801:Humans; D011859:Radiography; D013586:Synovitis, Pigmented Villonodular / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D013933:Thumb