[Intratumoral hemorrhage in choriocarcinoma during neuroendoscopic third ventriculostomy: case report].

The authors report a case of intratumoral hemorrhage in a pineal region choriocarcinoma during neuroendoscopic third ventriculostomy. A 12-year-old boy who presented with headache and vomiting had precocious puberty. Neuroimagings revealed a pineal region tumor with obstructive hydrocephalus and his serum HCG level was 4,280 mIU/ml. He was diagnosed as having choriocarcinoma and underwent neuroendoscopic third ventriculostomy for obstructive hydrocephalus. There were many tumor vessels observed on the tumor surface, some of which bled subcapsularly. Postoperative CT scan showed the tumor increased in size with the intratumoral hemorrhage. After irradiation and chemotherapy, the tumor disappeared with normalization of serum HCG level. His symptoms improved and no additional neurological deficit was observed in his clinical course. We might infer from this case that the intratumoral hemorrhage was induced by the intracranial pressure change during neuroendoscopic surgery. Perioperative management is very important for avoiding fetal intratumoral hemorrhage.