[Intraparenchymal brainstem schwannomas: report of three cases and literature review].

We report three patients with intraparenchymal brainstem schwannomas that were confirmed by surgery and pathological examination: tumors originated from the midbrain parenchyma, the dorsal aspect of the pontomedullary junction and the medulla oblongata respectively. Two of the presented patients differed in age of disease presentation which may reflect different mechanisms of tumor development according to the current views on origin of intraparenchymal schwannomas. One of the cases illustrates treatment of non-communicating hydrocephalus associated with ventricular tumors by preventive stenting of the cerebrospinal fluid pathways.

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