Imaging of complicated frontal sinusitis.

Complications occur in 3% of the cases of frontal sinusitis. These are mainly oculo-orbital, intracranial and osteomyelitis. Our aim is to describe the contribution of different imaging modalities in the diagnosis of these complications and their post-treatment monitoring. within a 15 years period (2000-2014), 10 patients with complicated frontal sinusitis were included into this retrospective study. 10 patients (9 males) aged 9 to 70 year old (mean 28). Two of these patients (20%) had a history of craniofacial trauma. Frontal headache was present in all cases (100%), frontal swelling in 8 cases (80%) and unilateral palpebral edema in 3 cases (30%). A CT scan of the face and brain was performed in all cases and revealed frontal osteomyelitis in 6 cases (60%), extradural empyema in 3 cases (33%), intracranial frontal abscess in 2 cases (20%) and occulo-orbital complications in 3 cases (30%). Magnetic resonance imaging was performed in one patient and demonstrated thrombosis of the upper longitudinal sinus. 40% of our patients associated 2 complications. Cross-sectional imaging is important in early and accurate diagnosis of complicated frontal sinusitis.