CT-guided percutaneous fine-needle aspiration biopsy of posterior skull base lesions

We describe a retroauricular approach, adjacent to the mastoid tip, in two patients that allowed successful biopsy of posterior skull be lesions. Diag noses were central giant cell granuloma, an unusual tumor rarely reported i n the skull base, and meningioma. In both patients, the needle biopsy accur ately identified the pathology found at surgery. The described approach may allow biopsy of posterior lesions that are inaccessible with other methods .