title: Painless ankle mass in a 12-year-old boy.
authors.affiliation: University of Pennsylvania, School of Medicine, Philadelphia, PA, USA.
authors.forename: Brian
authors.initials: B
authors.lastname: Forsythe
authors.forename: Julia
authors.initials: J
authors.lastname: Lou
authors.forename: Lisa
authors.initials: L
authors.lastname: States
authors.forename: Marta
authors.initials: M
authors.lastname: Guttenberg
authors.forename: John P
authors.initials: JP
authors.lastname: Dormans
mesh_terms: D000843:Ankle Joint / Q000473:pathology / Q000601:surgery; D001707:Biopsy, Needle; D002648:Child; D018210:Chondromatosis / Q000473:pathology* / Q000601:surgery; D005500:Follow-Up Studies; D006801:Humans; D007150:Immunohistochemistry; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D010146:Pain; D018570:Risk Assessment; D012983:Soft Tissue Neoplasms / Q000473:pathology* / Q000601:surgery*; D000074402:Synovectomy; D013583:Synovial Membrane / Q000473:pathology*; D016896:Treatment Outcome