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Case Reports
. 2014 Mar;7(1):43-50.
doi: 10.1055/s-0033-1356760. Epub 2013 Nov 14.

Myositis ossificans of the left medial pterygoid muscle: case report and review of the literature of myositis ossificans of masticatory muscles

Paolo Boffano  1 , Emanuele Zavattero  1 , Giovanni Bosco  1 , Sid Berrone  1
Affiliations
Case Reports

Myositis ossificans of the left medial pterygoid muscle: case report and review of the literature of myositis ossificans of masticatory muscles

Paolo Boffano et al. Craniomaxillofac Trauma Reconstr. 2014 Mar.

Abstract

Myositis ossificans is a disease that is characterized by nonneoplastic, heterotopic bone formation within a muscle. Myositis ossificans traumatica, also called myositis ossificans circumscripta, is a disease in which muscles are ossified presumably following acute trauma, burns, surgical manipulation, or repeated injury. It is often remitted after surgical excision though some patients have repeated recurrences. Myositis ossificans traumatica of masticatory muscles is not frequently reported in the literature, with the most common clinical finding being a progressive limitation of motion in the mandible. The aim of this article is to present and discuss a case of myositis ossificans traumatica of the left medial pterygoid muscle and to review the literature of myositis ossificans of the masticatory muscles.

Keywords: masticatory muscles; myositis ossificans; myositis ossificans traumatica; prosthesis; temporomandibular joint.

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Figures

Figure 1
Figure 1
Preoperative frontal (A) and lateral (B) images of the patient.
Figure 2
Figure 2
Panoramic radiograph revealing a radiopaque calcified region with apparent bony features in correspondence of the left coronoid process and sigmoid notch.
Figure 3
Figure 3
Axial computed tomography scan confirming the presence of irregular heterotopic calcification involving the left medial pterygoid muscle.
Figure 4
Figure 4
(A) Coronal computed tomography scan confirming the presence of irregular heterotopic calcification involving the left medial pterygoid muscle. (B) The medial pterygoid muscle origin is on the bottom of the mandible, but in this pathological case the ossification of some muscular fibers did not reach the bottom of the mandible. Therefore, the osteotomy was made to remove just the inner corticle and to remove the condyle.
Figure 5
Figure 5
Postoperative frontal (A) and lateral (B) images of the patient confirming the maintained facial symmetry after surgical treatment.
Figure 6
Figure 6
Postoperative panoramic radiograph showing the excision of the ossification and the correct placement of the temporomandibular joint prosthesis.
Figure 7
Figure 7
Postoperative posteroanterior cranial radiograph confirming the correct placement of the temporomandibular joint prosthesis.
See this image and copyright information in PMC

References

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