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Case Reports in Orthopedics
Volume 2017 (2017), Article ID 1690409, 4 pages
Case Report

An Interesting Case of Intramuscular Myxoma with Scapular Bone Lysis

1Division of Orthopaedics and Trauma Surgery, Department of Surgery, Geneva University Hospitals, Geneva, Switzerland
2Rive Droite Radiology Center, Geneva, Switzerland
3Faculty of Medicine, University of Geneva, Geneva, Switzerland
4Division of Orthopaedics and Trauma Surgery, La Tour Hospital, Geneva, Switzerland

Correspondence should be addressed to Alexandre L├Ądermann

Received 30 September 2016; Revised 12 December 2016; Accepted 28 December 2016; Published 17 January 2017

Academic Editor: Akio Sakamoto

Copyright © 2017 Jérôme Tirefort 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.


Introduction. Intramuscular myxoma is a rare benign primitive tumor of the mesenchyme founded at the skeletal muscle level; it presents itself like an unpainful, slow-growing mass. Myxomas with bone lysis are even more rare; only 7 cases have been reported in the English literature, but never at the shoulder level. Case Presentation. We describe an 83-year-old patient with a growing mass in the deltoid muscle with unique scapular lysis, without any symptom. Magnetic resonance imaging (MRI) and a biopsy were performed and the diagnosis of intramuscular myxoma has been retained. In front of this diagnosis of nonmalignant lesion, the decision of a simple follow-up was taken. One year after this decision, the patient was still asymptomatic. Conclusion. In the presence of an intramuscular growing mass with associated bone lysis, intramuscular myxoma as well as malignant tumor should be evoked. MRI has to be part of the initial radiologic appraisal but biopsy is essential to confirm the diagnosis. By consensus, the standard treatment is surgical excision but conservative treatment with simple follow-up can be an option.