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Communicating hydrocephalus occurring in the postoperative course of glioblastoma multiforme.

We experienced a case of glioblastoma multiforme which exhibited dementia, gait disturbance, headache, and urinary incontinence six months after subtotal removal of the tumor. These symptoms were not due to tumor recurrence, but to communicating hydrocephalus. Communicating hydrocephalus in cases of malignant brain tumors has not often been reported. We discuss the development of this abnormality.