Myositis ossificans traumatica of the masticatory muscles: etiology, diagnosis and treatment.

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Abstract

[Indexed for MEDLINE] Conflict of interest statement: ETHICS APPROVAL AND CONSENT TO PARTICIPATE: The ethical approval for this study was obtained from the ethical review committee (Ref. no. 2017–052-f-N), Ethikkommission der Ärztekammer Westfalen-Lippe und der Westfälischen Wilhelms-Universität, Münster, Germany.Written informed consent was obtained from the patient. CONSENT FOR PUBLICATION: Written informed consent was obtained from the patient for publication of the case report and any accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal. COMPETING INTERESTS: The authors declare that they have no competing interests. PUBLISHER’S NOTE: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. 18. Eur J Orthop Surg Traumatol. 2017 May;27(4):491-502. doi: 10.1007/s00590-017-1932-x. Epub 2017 Mar 9. Myositis ossificans in children: a review. Sferopoulos NK(1), Kotakidou R(2), Petropoulos AS(3). Author information: (1)Departments of Pediatric Orthopaedics, Pathology and Pediatric Surgery, "G. Gennimatas" Hospital, P. Papageorgiou 3, 546 35, Thessaloniki, Greece. sferopoulos@in.gr. (2)Consultant Pathologist, Department of Pathology, "G. Gennimatas" Hospital, Thessaloniki, Greece. (3)Emeritus Professor of Pediatric Surgery, Aristotle University of Thessaloniki, "G. Gennimatas" Hospital, Thessaloniki, Greece. The formation of lamellar bone in the soft tissues, where bone normally does not exist, is called myositis ossificans. However, it would be more accurate to describe as myositis ossificans the involvement of skeletal muscles and as ectopic or heterotopic ossification the involvement of soft tissues in general. The lesion is subdivided in genetic and non-genetic or acquired types. Myositis or fibrodysplasia ossificans progressiva is a debilitating rare genetic disorder. Clinical suspicion of the disease in the newborn on the basis of malformed great toes may lead to early clinical diagnosis, confirmatory diagnostic genetic testing and avoidance of iatrogenic harmful procedures. Acquired lesions involve the neurogenic myositis ossificans and the non-neurogenic disorder. The latter is defined either as circumscribed myositis ossificans that is post-traumatic or as idiopathic/pseudomalignant myositis ossificans that is non-traumatic and may be a form fruste of fibrodysplasia ossificans progressiva. Ossification in fibrodysplasia ossificans progressiva is irreversible, unlike other forms of heterotopic ossification. In this retrospective study, a total of 22 children with myositis ossificans treated in a 20-year period were identified and classified. Two patients were diagnosed with myositis/fibrodysplasia ossificans progressiva, one with neurogenic myositis ossificans, one with idiopathic/pseudomalignant myositis ossificans and 18 patients with circumscribed myositis ossificans. The clinical features, imaging and histological findings as well as treatment modalities and complications of myositis ossificans in our patients are presented and discussed. DOI: 10.1007/s00590-017-1932-x