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Twenty-six patients (16 male and 10 female) ranging in age from 5 to 68 years underwent suboccipital transcerebellar stereotaxic biopsy of mass lesions situated in the pons. No complications were encountered in the perioperative period when this technique was used. Histological diagnosis of the lesions revealed: astrocytomas in 14 patients, oligodendroglioma in one, ependymoma in one, cryptococcal abscess in one, demyelinating disease in three, and infarctions in three. Empiric treatment of brain-stem lesions without tissue diagnosis based upon the radiological and clinical findings may result in inappropriate therapy administration. Alternatively, open operative procedures to obtain tissue require a visible surface abnormality to guide biopsy, and carry the risks of a major surgical procedure in already compromised patients. For these reasons the authors consider a suboccipital transcerebellar stereotaxic biopsy to be the diagnostic procedure of choice in the assessment of pontine mass lesions. |
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astrocytoma
brain biopsy
brain biopsy,stereotaxic
brainstem,glioma
brainstem,infarction of
brainstem,neoplasms of
cerebrovascular accident
demyelinating disease
glioma
middle cerebellar peduncle
middle cerebellar peduncle,lesion
pons,lesion of
pontine glioma
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