How to approach a bilobed petrous apex granuloma: a case report.

Cholesterol granulomas are the most common lesions involving the petrous apex. However, they are still an uncommon finding overall, and they often remain undiagnosed until they have become extremely large and symptomatic. Many surgical approaches to the petrous apex exist. Factors that often influence the surgical approach include the surgeon's experience, the patient's anatomy, and the patient's hearing status. The purpose of this case report-which involved a 66-year-old woman who was referred to our clinic for evaluation of severe headaches, dizziness, and left-sided pulsatile tinnitus-is to demonstrate the definitive need for an extended middle fossa approach when a bilobed petrous apex mass is encountered.