Myositis ossificans traumatica of temporalis and medial pterygoid muscle

Abstract

Myositis ossificans is a rare disease that is characterized by bone deposition in the muscle or soft tissues. Myositis ossificans of the masticatory muscles is an uncommon finding. The condition is benign and results in heterotopic bone formation in the muscles of mastication, usually producing limitation of opening of the jaws. It is important to know the exact cause of the limitation of opening of the jaws for successful treatment. Computed tomographic scan and panoramic radiographs along with histological findings are essential diagnostic aids for evaluating conditions such as myositis ossificans. A rare case of myositis ossificans traumatica of temporalis and medial pterygoid muscle is presented here along with the discussion of clinical, radiological and histological features. The present case emphasizes not only on the importance of considering myositis ossificans in the differential diagnosis of limitation of opening of the jaws but also on the improvement of the overall mouth opening and treatment results.

Myositis ossificans of the masseter muscle: A rare location. Report of a case and review of literature

“…But other symptoms could be showed like pain, facial asymmetry or swelling. The absence of symptoms it’s also a possibility ( 8 ) and in some cases its diagnosis could be prolonged more than 20 years ( 9 ). A differential diagnosis should be done between others pathologies with similar clinical manifestations ( Table 1 ).…”

A case of dystrophic calcification in the masseter muscle

“…On a radiograph, the linear streaks running in the same direction as the normal muscle fibers are regarded as a typical character for myositis ossificans [ 13 ]. In our case, the patient had no trismus and the radiographic finding was different from myositis ossificans [ 15 ].…”

An Unusual Presentation of Myositis Ossificans in a Pediatric Patient

“…2 More than 75% of MO cases are found in large skeletal muscles, that is, the quadriceps femoris, brachialis anticus, thigh adductors, and the deltoid muscle. 3 Progression of the condition initially involves growth in size of the lesion until it peaks, decreasing range of motion, and often times, pain. 4 Several case reports have been published presenting unusual locations and presentations of MO over the past 50 years and include lumbar spine, 5 temporalis and medial pterygoid muscles, 3 elbow, 6 as well as many others.…”