Reactive post-radiotherapy bone formation in the maxilla

Area of Science:

• Oncology
• Oral and Maxillofacial Surgery
• Radiotherapy

Background:

• High-dose radiation therapy can negatively impact bone metabolism.
• Post-treatment bone formation after radiotherapy is typically rare.

Observation:

• A patient with squamous cell carcinoma underwent maxillary resection and orbital exenteration.
• Adjuvant radiotherapy was administered due to compromised surgical margins.

Findings:

• Four months post-radiotherapy, new bone formation was observed in the maxillary, nasal, and orbital cavities.
• Biopsies confirmed normal tissue, ruling out residual cancer or osteoradionecrosis.

Implications:

• This case presents the first documented instance of extensive early bone formation as a consequence of head and neck radiotherapy.
• Highlights an unusual biological response to radiation in bone metabolism.