title: Intra-articular osteoid osteoma of the distal humerus: a diagnostic challenge.
abstract: Osteoid osteoma rarely presents in an intra-articular or juxta-articular location, leading to synovitis and flexion deformity, which can easily mislead the diagnosis. We present a case of an intra-articular osteoid osteoma of the distal humerus in a 19-year-old woman with pain and flexion deformity of the elbow. Although radiographs were normal, a nidus was demonstrated on CT scan. Appropriate surgical treatment provided relief to the patient and the diagnosis was confirmed on histopathology. Thus, an intra-articular osteoid osteoma may be mistaken for more common causes of synovitis unless there is an index of suspicion and appropriate imaging is undertaken.
authors.affiliation: Department of Orthopaedics, Kasturba Medical College, Manipal, Karnataka, India.
authors.forename: Nikhil Subhash
authors.initials: NS
authors.lastname: Challawar
authors.forename: Hitesh Hasmukhlal
authors.initials: HH
authors.lastname: Shah
mesh_terms: D001859:Bone Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging* / Q000601:surgery; D004551:Elbow Joint / Q000000981:diagnostic imaging* / Q000601:surgery; D005260:Female; D006801:Humans; D006811:Humerus / Q000000981:diagnostic imaging* / Q000601:surgery; D010017:Osteoma, Osteoid / Q000175:diagnosis / Q000000981:diagnostic imaging* / Q000601:surgery; D016059:Range of Motion, Articular; D014057:Tomography, X-Ray Computed; D055815:Young Adult