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Case Reports in Orthopedics
Volume 2016 (2016), Article ID 1982656, 4 pages
Case Report

Nontraumatic Myositis Ossificans of Hip: A Case Presentation

1Sisli Hamidiye Etfal Training and Research Hospital, 19 Mayıs Mahallesi, Sisli, 34360 Istanbul, Turkey
2Igdir State Hospital Orthopaedics and Traumatology Department, Igdir, Turkey

Received 23 March 2016; Revised 8 June 2016; Accepted 9 June 2016

Academic Editor: Koichi Sairyo

Copyright © 2016 Yunus Oc 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.


In most of the cases trauma is the leading etiology and the nontraumatic myositis ossificans (MO) is a very rare condition. We present an MO case without any trauma occurring. A 36-year-old female patient with a history of pain and restriction of range of motion of the left hip was admitted. Hip motions were restricted with 10–60° of flexion, 10° of internal rotation, 20° of external rotation, 10° of abduction, and 10° of adduction. There was no history of trauma and familial involvement. The biopsy of the lesion revealed mature bone tissue confirming our diagnosis of MO. The mass was removed surgically and postoperatively the patient was treated with a single dose radiotherapy with 800 gyc. MO is a benign and well differentiated bone formation or in other words heterotopic ossification of the muscle tissue. It has a prevalence of less than 1/1 million. Trauma is the most frequent etiological factor seen in almost 60–75% of the cases. Nontraumatic MO is very rare in the literature. Our patient had no history of trauma or familial involvement. Combination of the surgical excision with radiotherapy in the treatment of the MO of the hip may give satisfactory results.