Anatomic variants of the cerebello-pontine cisterns and their significance in positive contrast cisternography.
Far lateral extension of the cerebello-pontine cistern is a common variant which is found in greater than 50% of people. When present it may cause the internal auditory canal to be obscured during positive contrast cisternography. A technique of cisternography is described which facilitates the diagnosis of intracanalicular lesions as well as better delineating small lesions in the cerebello-pontine angle.
D001932:Brain Neoplasms / Q000000981:diagnostic imaging; D002530:Cerebellopontine Angle / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D006801:Humans; D008722:Methods; D009442:Neurilemmoma / Q000000981:diagnostic imaging; D011011:Pneumoencephalography; D013346:Subarachnoid Space / Q000033:anatomy & histology / Q000000981:diagnostic imaging*