Coronoid process enlargement

Abstract

Summary A review of the literature indicates that 39 cases of coronoid process enlargement have been reported; 13 of these patients had bilateral involvement. The review includes French publications in which the condition is termed Jacob's disease. In addition, the case reports of six patients are described, five of whom had bilateral coronoid process enlargement. The fact that three patients came from one family proves that there are hereditary aspects to the condition, so far not described in literature. An ancillary anomaly, namely inability to extend the fingers at the interphalangeal joints in dorso-flexion of the wrist, was also observed. Careful radiological examination, including fluoroscopy, may reveal malar bone exostosis and the exact point of impingement. If surgical treatment is indicated, the importance of post-operative physiotherapeutic management is emphasised in order to improve function as soon as possible.