Traumatic myositis ossificans in masticatory muscles

Area of Science:

• Oral and Maxillofacial Surgery
• Musculoskeletal Pathology

Background:

• Traumatic myositis ossificans circumscripta (MOC) is a benign bone-forming tumor that can occur after trauma.
• Masticatory muscle involvement is rare but can lead to significant morbidity.

Observation:

• Presents three cases of MOC in masticatory muscles.
• Two cases involved the masseter muscle; one case involved the temporalis muscle.

Findings:

• Describes three pathognomonic histological zones for differentiating MOC from sarcomatous lesions.
• Histological features aid in accurate diagnosis, crucial for appropriate management.

Implications:

• Highlights the importance of early surgical intervention for MOC in masticatory muscles.
• Wide excisional biopsy is stressed as the optimal treatment approach for these lesions.