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Query: UMLS:C0027651 (tumor)
 685,946 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Findings of electronystagmography in 30 patients with posterior cranial fossa tumor were analysed. Of the 23 cases of CPA tumor, size varied between 0.7-5.0 cm, the ENG showed: (1) The nystagmus occurred in 83% of patients. (2) In ODT, overshoots was showed in 22% of patients. (3) ETT showed type III or IV curves in 55.6% of patients. (4) OKP test decreased in 59% of patients. (5) Caloric test showed canal paresis in 85% of the patients. (6) Abnormal visual suppression test occurred in 60% of patients. (7) Abnormal ABR was found in 89% of patients. We also found that tumor larger than 2.5 cm presented a central type nystagmus (Bruns nystagmus) and involvement of the eye movement system. The electronystagmographic changes of the tumors of cerebellum (3 cases) and brain stem (4 cases) was discussed.
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PMID:[Electronystagmographic changes in patients with posterior cranial fossa tumors]. 803 98

The authors report a case of dumbbell-shaped hypoglossal neurinoma. A 46-year-old female was admitted to our clinic with a history of right hemiatrophy of the tongue for more than 10 years and bilateral paresthesia on the face and legs for half a year. Neurological findings on admission were right hypoglossal palsy, attenuation of right gag and palatal reflex, mild truncal ataxia, right Bruns nystagmus, bilateral paresthesia on the face and legs (left > right), bilateral hyper-reflexia on the extremities. No sign of increased intracranial pressure was noted. Conventional computed tomography demonstrated the bone destruction around the right hypoglossal canal, and three-demensional computed tomography clearly revealed the extent of the bone destruction. Magnetic resonance imaging showed a large dumbbell-shaped mass extending both intra-and extra-cranially through the right hypoglossal canal, which severely compressed the brainstem postero-medially. Right suboccipital craniotomy with C1 laminectomy was performed in the prone position, and the occipital bone was drilled far-laterally around the Foramen Magnum with right occipital condyle rongeured to expose the intracanallicular mass. The mass was totally removed except around the IX Xth cranial nerves near the jugular foramen. Hypoglossal neurinoma is rare, and our case is the 62nd case, and the 15th dumbbell-shaped case in the literature. Hypoglossal nerve palsy is characteristic in dumbbell-shaped hypoglossal neurinoma. Enlargement of the hypoglossal canal can be detected by conventional and three-dimensional CT. MRI is more effective than CT in revealing the mass. Total removal of the dumbbell-shaped tumor requires that the hypoglossal canal can be exposed sufficiently.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:[A case of dumbbell-shaped hypoglossal neurinoma]. 807 37

Although vestibular schwannoma is a common tumor in the cerebellopontine angle, calcified vestibular schwannoma is rare. A 59-year-old woman with sudden onset epileptic seizures, was referred to Hokkaido Neurosurgical Memorial Hospital. Neurological examination revealed left Bruns nystagmus, left deafness and left cerebellar ataxia. Brain MRI revealed a mass, about 3cm in diameter, in the left cerebellopontine angle. The mass showed heterogeneous intensity on T1- and T2-weighted and fluid-attenuated inversion recovery (FLAIR) images. Hydrocephalus was seen. On CT scan, the tumor was calcified. Preoperatively, vestibular schwannoma, meningioma, cavernous hemangioma, or thrombosed giant aneurysm were considered as differential diagnoses. The pathological diagnosis was schwannoma. For a calcified mass in the cerebellopontine angle, vestibular schwannoma should be considered in the differential diagnosis to plan appropriate treatment strategies.
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PMID:Calcified vestibular schwannoma in the cerebellopontine angle. 1788 7