title: A 77-year-old man with a gradually enlarging mass of the left ring finger.
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 the first page. The final clinical and roentgenographic differential diagnoses are presented on the following pages.
authors.affiliation: Beijing Ji Shui Tan Hospital, People's Republic of China.
authors.forename: Y
authors.initials: Y
authors.lastname: Yin
authors.forename: L A
authors.initials: LA
authors.lastname: Gilula
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D005385:Fingers; D005870:Giant Cell Tumors / Q000175:diagnosis*; D006801:Humans; D008297:Male; D012983:Soft Tissue Neoplasms / Q000175:diagnosis*; D013710:Tendons