Intratumoral Hemorrhage after a Ventriculoperitoneal Shunting Procedure

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Abstract
Ventriculoperitoneal shunting has been accepted as a safe and useful preliminary procedure that lowers the mortality and morbidity of definitive surgery for tumors causing obstructive hydrocephalus. We are reporting four patients with intratumoral hemorrhage as a complication of shunting. The hemorrhage was massive and fatal in two patients, one with an unverified pineal tumor and the other with a malignant astrocytoma of the thalamus. The hemorrhage was small and limited in the other two patients, one with a glioblastoma of the thalamus and the other with a cerebellar astrocytoma. On the basis of this experience, we conclude that the possibility of intratumoral hemorrhage should be taken into consideration when planning the preoperative management of obstructive hydrocephalus caused by brain tumors. It is possible that ventricular decompression may result in rapid motion and distortion of the intracranial structures and a sudden imbalance between intracranial and intratumoral pressures, leading to vascular insufficiency, congestion, and then hemorrhage within the tumor.

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