angle tumors: Role of magnetic resonance imaging Williams and Wilkins , Inc.
Twenty one patients were analysed which show cerebellopontine
angle mass characteristic of acoustic schwannoma with male-female ratio of 2:1.
6) Contrast-enhanced magnetic resonance imaging (MRI) of the cerebellopontine
angle showed a neurovascular compression between the left PICA and the roots of the lower cranial nerves (figure 2).
Only rarely do they extend beyond the cerebellum into the cerebellopontine
angle (CPA) ganglionic hamartomas are rare.
Cushing H: Tumors of the Nervus Acusticus and the Syndrome of the Cerebellopontine
Granulocytic sarcomas have been reported frequently in the orbits (3) and less frequently in various other sites, including the gingiva, (4) maxilla, (5) parotid gland, (6-8) temporal bone, (8) temporal lobe of the brain, (9) cerebellopontine
angle (causing sudden sensorineural hearing loss), (10) and masseter muscle.
angle lipoma: 10% (the facial nerve and vestibulocochlear nerve often courses through the lipoma - see case 1).
Incidental findings on magnetic resonance imaging screening for cerebellopontine
Retrocerebellar and lateral cerebellopontine
angle are the most common infratentorial locations.
an absence of recordable waves in a patient with complete deafness) or if it indicated neural inflammation or a cerebellopontine
angle tumor (e.
Marangos et al described a unique analysis of ABR thresholds in patients with cerebellopontine
Five hyperdense extra-axial lesions appeared as well marginated, homogenous, dural based masses, four located supratentorially and one at the cerebellopontine
angle, causing buckling of white matter having high attenuation and strong contrast enhancement.
20-21) In some cases, the tumor reached the cerebellopontine
angle or invaded the cerebellum.
INTRODUCTION: Congenital cholesteatoma arises from the embryonic epidermal crest, is a benign Disease with slow progressive growth that destroys neighboring structures, it is considered an epidermal cyst originating from the remnants of squamous keratinized epithelium, the disease may appear in several regions of the temporal bone such as in the middle ear (most frequent site) as well as in the petrous apex, cerebellopontine
angle, external acoustic meatus and mastoid process, congenital cholesteatoma of the mastoid process is the rarest form of presentation in the temporal bone, only 2 to 4% of cholesteatoma presenting to pediatric otologist are congenital in origin.