Precervical myositis ossificans in an infant secondary to child abuse

Area of Science:

• Pediatric Radiology
• Pediatric Pathology
• Musculoskeletal Imaging

Background:

• Myositis ossificans circumscripta (MO) is a benign bone-forming tumor characterized by heterotopic ossification.
• MO typically affects the extremities and is uncommon in infants, particularly in the head and neck region.
• Nonaccidental trauma is an important, though infrequent, cause of MO in pediatric patients.

Observation:

• A 10-week-old infant presented with a neck mass, suspected to be MO.
• The clinical presentation suggested nonaccidental trauma as the etiology.
• Imaging studies revealed a lesion in the neck consistent with MO.

Findings:

• Ultrasound-guided biopsy was performed for diagnosis.
• Pathological examination confirmed heterotopic ossification characteristic of MO.
• Imaging findings demonstrated typical features of MO in an unusual location.

Implications:

• This case underscores the importance of considering MO in infants with neck masses, even in rare locations.
• Accurate diagnosis through imaging and biopsy is crucial for appropriate management.
• Recognizing MO secondary to nonaccidental trauma is vital for child protection and timely intervention.