title: Osborne-cotterill lesion: an osseous defect of the capitellum associated with instability of the elbow.
abstract: OBJECTIVE
  Posterolateral rotatory instability of the elbow is a diagnosis largely made by clinical examination; no relevant radiographic signs have been reported. We have seen four patients with an osseous defect and detachment of a fragment of bone in the posterolateral margin of the capitellum. These patients had chronic posterolateral rotatory instability of the elbow.
  
  
  CONCLUSIONS
  An osseous defect of the posterolateral corner of the capitellum is an uncommon finding that in each instance was associated with chronic posterolateral rotatory instability of the elbow. We termed this lesion the "Osborne-Cotterill lesion." We report our findings in these patients; when this lesion is diagnosed, clinicians should consider posterolateral rotatory instability.
authors: Department of Orthopaedic Surgery, School of Medicine, Kyungpook National University, 50, Samduk, Chung-gu, Daegu, Korea 700-721. jeonchoi@chol.com
authors: In-Ho
authors: IH
authors: Jeon
authors: Ivan D
authors: ID
authors: Micic
authors: Nobuyuki
authors: N
authors: Yamamoto
authors: Bernard F
authors: BF
authors: Morrey
mesh_terms: D000293:Adolescent; D000328:Adult; D004551:Elbow Joint / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D006810:Humeral Fractures / Q000000981:diagnostic imaging*; D004204:Joint Dislocations / Q000000981:diagnostic imaging*; D007593:Joint Instability / Q000000981:diagnostic imaging*; D008297:Male; D011859:Radiography; D013577:Syndrome; D000092464:Elbow Injuries