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Primary treatment included closed elbow reduction followed by immobilisation in a plaster in all cases, with an additional excision of the radial head in 11, partial resection in two and suturing of the annular ligament in two. Delayed radial head excision was performed in two patients and an ulnar nerve transposition in one. The uninjured elbows served as controls. Nine patients had no symptoms, 11 reported slight impairment, and one severe impairment of the elbow. Elbow flexion was impaired by a mean of 3\u00b0 (sd 4) and extension by a mean of 9\u00b0 (sd 4) (p &lt; 0.01). None experienced chronic elbow instability or recurrent dislocation. There were more degenerative changes in the formerly injured elbows, but none had developed a reduction in joint space. <\/jats:p><jats:p> We conclude that most patients with a Mason type IV fracture of the elbow report a good long-term outcome. <\/jats:p>","DOI":"10.1302\/0301-620x.91b11.21957","type":"journal-article","created":{"date-parts":[[2009,10,31]],"date-time":"2009-10-31T21:17:52Z","timestamp":1257023872000},"page":"1499-1504","source":"Crossref","is-referenced-by-count":20,"title":["Mason type IV fractures of the elbow"],"prefix":"10.1302","volume":"91-B","author":[{"given":"P.","family":"Herbertsson","sequence":"first","affiliation":[{"name":"Department of Orthopaedics"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"R.","family":"Hasserius","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"P. 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