Unusual Behavior of a Posttraumatic Scar: Craniofacial Actinomycosis.

Actinomycosis is a chronic suppurative granulomatous infection most commonly involving the cervicofacial region. Clinical diagnosis is usually difficult, and fine-needle aspiration cytology or imaging studies are usually unhelpful in diagnosing actinomycosis. Definitive diagnosis is based on the histopathological examination of a tissue biopsy. The authors report a case of a 32-year-old healthy man who underwent multiple surgeries over a period of 7 years to correct a posttraumatic scar on his forehead with unusual behavior. Final diagnosis was made by tissue biopsy. Scar was excised and penicillin was administered for 1 month postoperatively; after a 12-month follow-up, the wound was fully healed with minimal scarring and no recurrence.