Giant osteoma of the frontal sinus.

Osteoma is the most common benign tumour of the nose and paranasal sinuses, and the frontal sinus is its most frequent location. This tumour may be discovered incidentally on radiographs, or may enlarge to produce symptoms and, rarely, complications referable to its location near the orbit and anterior cranial vault. A 61-year-old man presented with right proptosis was found to have a giant osteoma involving frontal sinus. The aetiology, presenting features, and treatment of this tumour are reviewed.