High-resolution CT in the evaluation of glomus tumors of the temporal bone.

High-resolution computed tomography (HRCT) was performed in 33 cases of glomus tumors of the temporal bone and 10 cases of other tumors in and around the jugular foramen. HRCT helped to differentiate glomus tumors from vascular anomalies and from other benign or malignant lesions, and to determine the extent of deep involvement. It provided essential information for planning the surgical approach. When a lesion is large or appears atypical, complementary angiography is helpful. Otherwise, angiography may not be necessary.