Osteomyelitis of the frontal bone secondary to frontal sinusitis

Osteomyelitis of the frontal bone is becoming an increasingly rare complica tion of frontal sinusitis. We present seven cases that represent the larges t series published in the last 50 years. Three cases were associated with i ntracranial involvement. Osteomyelitis should enter the differential diagno sis when there is a fluctuant swelling on the scalp, or if there is a disch arging fistula. Treatment requires aggressive surgery to remove all sequest ra in combination with long-term antibiotic therapy. Intracranial complicat ions should be excluded by imaging and treated simultaneously if present.