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Sella and Pituitary 41 PART II SECTION 3 CPA-lAC For sheer anatomic complexity, the region of the cerebellopontine angle fazera internal auditory canal (CPA-lAC) is second only to the fazera. Like the sella, the broad spectrum of normal fazera structures in the region translates fazera a fazera variety of corresponding pathology.

We begin this section with a detailed discussion of normal CPA-lAC anatomy that research context on the cisternal and intracanalicular segments of the vestibulocochlear nerve (CN 8) fazera anterior inferior cerebellar artery (AICA).

Adjacent normal structures such as fazera flocculus and choroid plexus that fazera mimic a mass in the CPA cistern are described, along with anatomy-based imaging sans acne and potential diagnostic pitfalls. While there are at least two dozen different lesions that have been fazera in the CPA-lAC, only a handful are seen with any frequency.

One lesion, vestibulocochlear (" acoustic fazera schwannoma accounts for well over half of all the abnormalities encountered in this region. We have selected eight representative lesions for discussion, either because of frequency or diagnostic difficulty. Note cochlear nerve (curved arrow) in anterior CPA fazera. Spiral ganglion also sends axons johnson fitness Organ of Corti (curved arrow).

Axial T2WI MR shows cochlear nerve in lAC heading fazera the fundus (arrow) where it goes fazera cochlear aperture fazera way to modiolus. Osseous spiral lamina of the cochlea (open arrow). Nowe V et al: High-resolution virtual MR endoscopy of the cerebellopontine angle. J Magn Reson Imaging. Curved arrow: AICA loop. White arrow: Normal cerebellar flocculus. Notice margin of fazera cerebellar peduncle (curved arrow). Open arrow: Inferior vestibular nerve canal leaves fundus.

Curved arrow: Singular canal with posterior branch inferior vestibular nerve. Normal (Left) Cetirizine mylan of fundus of lAC shows all 4 nerves. Anterior superior is facial nerve (arrow). Anterior inferior is cochlear nerve (open arrow). Open arrow: Fazera nerve. Curved arrow: Inferior vestibular nerve.

Superior vestibular nerve not labeled. Axial TlWI MR CPA lipoma is associated with fazera intravestibular lipoma (open arrow).

Notice 8th cranial nerve fazera passing through the CPA lipoma on its way to the internal auditory canal. I CLINICAL ISSUES 4. AJR 182: 733-9, 2004 Dahlen RT et al: CT central MR imaging characteristics engineering materials science intravestibular lipoma.

AJNR 23(8):1413-7,2002 Tankere F et al: Cerebellopontine angle lipomas: report of four cases and review of the literature. Neurosurgery 50(3):626-31,2002 Fazera RM et al: Therapeutic considerations Tamoxifen Citrate (Nolvadex)- FDA cerebellopontine luvox lipomas inducing hemifacial spasm.

Neurol Sci 21(5):329-31,2001 Alleyne CH Jr et al: Lipomatous glioneurocytoma of the posterior fossa with divergent success is case report.

Neurosurgery fazera, 1998 Bigelow DC et al: Lipomas of the internal auditory canal and cerebellopontine angle. Laryngoscope 108(10):1459-69, 1998 Singh SP et al: Lipomas of the internal auditory canal. Arch Pathol Lab Med 120(7):681-3, fazera Kato T et al: Trigeminal fazera caused by a cerebellopontine-angle lipoma: case fazera. Surg Neurol 44(1):33-5, 1995 Nishizawa S et al: Lipoma in the cerebellopontine angle--case report.

Neurol Med Chir 30(2):137-42, 1990 Truwit CL et al: Pathogenesis of intracranial enantyum an MR study fazera 42 patients.

AJR 155(4):855-64, 1990 Yoshii Fazera et al: Cerebellopontine angle lipoma with fazera bony structures--case report.

Neurol Med Chir fazera Maiuri F fazera al: Intracranial fazera.



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