A CASE OF cerebellopontine angle petrous bone osteoma manifesting as homolateral trigeminal neuralgia and causing a mild brain stem compression is presented. The literature concerning osteomas and particularly those affecting the temporal bone is reviewed. This is the second report of an osteoma located on the inner surface of the petrous bone and causing intracranial complications. Moreover, we discuss the intracranial tumors presenting with trigeminal neuralgia or atypical facial pain.