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Case Reports
. 2016 Sep;10(3):340-4.
doi: 10.1007/s12105-015-0675-4. Epub 2015 Dec 24.

Myositis Ossificans of the Temporalis Muscle

Otávio Emmel Becker  1 , Rafael Linard Avelar  2 , Elena Riet Correa Rivero  3 , Rogério Belle De Oliveira  4 , Maria Inês Meurer  3 , Aira Maria Bonfim Santos  5 , Orion Luis Haas Júnior  4 , Eduardo Meurer  6
Affiliations
Case Reports

Myositis Ossificans of the Temporalis Muscle

Otávio Emmel Becker et al. Head Neck Pathol. 2016 Sep.

Abstract

Traumatic myositis ossificans (TMO) is a rare ossifying disease that occurs in the muscle or soft tissues. A case of TMO isolated in the temporalis muscle is reported. In the case described, calcification in the temporalis muscle was confirmed after computed tomography. Surgery, physiotherapy, and histopathological analysis were performed. One year after treatment, further ossification was present but without interference in function. The most accepted treatment for TMO in the maxillofacial region is excision followed by physiotherapy. The high rate of non-recurrence may be concealed due to the short follow-up period. TMO is a lesion that may frequently recur and long-term follow-up must be provided.

Keywords: Closed head injuries; Heterotopic calcification; Masticatory muscles; Myositis ossificans; Stomatognathic system.

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Figures

Fig. 1
Fig. 1
CT 30 days after fracture reduction with cortical thickening and solid periosteal reaction of the coronoid process (arrow) of the mandible associated with increase in volume of the surrounding soft tissues
Fig. 2
Fig. 2
Hematoxylin and eosin (HE) staining. Osseous metaplasia occurring in the striated muscle tissue (100X)
Fig. 3
Fig. 3
High magnification of Fig. 2 (400X)
Fig. 4
Fig. 4
Normal mouth opening 12 months after surgery
See this image and copyright information in PMC

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