Case of penetrating brain injury caused by a ventriculoperitoneal shunting procedure.

Brain injury with ventricle puncture is a well-known complication of ventriculoperitoneal (VP) shunting. However, parenchymal injuries caused by a shunt tunneller are rare. Herein, we present a case of penetrating brain injury caused by a shunt tunneller during VP shunting. An 83-year-old woman with brainstem glioma underwent VP shunting to control hydrocephalus due to tumour growth. She underwent brainstem tumour biopsy with a lateral suboccipital approach. After the shunting, CT showed a linear haematoma in the left occipital lobe far from the site of the ventricular puncture. MRI revealed a small contusion in the left cerebellar hemisphere, disconnection of the left tentorial membrane and linear haematoma on a straight line. These facts suggested that the shunt tunneller had penetrated the skull through the craniotomy of the posterior fossa. This is a rare complication of VP shunting, with limited cases reported in the literature.