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Case Reports in Orthopedics
Volume 2016 (2016), Article ID 9580485, 3 pages
Case Report

Coracoid Process Avulsion Fracture at the Coracoclavicular Ligament Attachment Site in an Osteoporotic Patient with Acromioclavicular Joint Dislocation

1Department of Orthopaedic Surgery, Tonan Hospital, Kita-1-jou Nishi-6-chome, Chuo-ku, Sapporo, Hokkaido 060-0001, Japan
2Itou Orthopaedic Hospital, Minami-2-jou Nishi-10-chome 5, Chuo-ku, Sapporo, Hokkaido 060-0062, Japan

Received 14 January 2016; Revised 22 June 2016; Accepted 30 June 2016

Academic Editor: Georg Singer

Copyright © 2016 Yoshihiro Onada et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Coracoid fractures are uncommon, mostly occur at the base or neck of the coracoid process (CP), and typically present with ipsilateral acromioclavicular joint (ACJ) dislocation. However, CP avulsion fractures at the coracoclavicular ligament (CCL) attachment with ACJ dislocation have not been previously reported. A 59-year-old woman receiving glucocorticoid treatment fell from bed and complained of pain in her shoulder. Radiographs revealed an ACJ dislocation with a distal clavicle fracture. Three-dimensional computed tomography (3D-CT) reconstruction showed a small bone fragment at the medial apex of the CP. She was treated conservatively and achieved a satisfactory outcome. CP avulsion fractures at the CCL attachment can occur in osteoporotic patients with ACJ dislocations. Three-dimensional computed tomography is useful for identifying this fracture type. CP avulsion fractures should be suspected in patients with ACJ dislocations and risk factors for osteoporosis or osteopenia.