Computerized tomographic findings in mucoceles of the frontal and ethmoid sinuses.

Computerised tomography (CT) is a valuable aid in the investigation of diseases of the paranasal sinuses. Seven patients with surgically proven mucoceles of the frontal or ethmoid sinuses are presented. In each case, proptosis was the main presenting symptom. Although the diagnosis was suspected on plain skull radiographs, CT confirmed the benign nature of the lesion and gave an accurate display of its extent.