[A case with postoperative calcified epidural hematoma].

In the literature, postoperative calcified epidural hematoma is not common. The authors report a case of calcified epidural hematoma after ventriculoperitoneal shunt, and radiotherapy for pinealoma. A 14-year-old boy was admitted to author's department on December 9, 1983, complaining of headache. He underwent a ventriculoperitoneal shunt on August 28, 1980 under the diagnosis of hydrocephalus caused by pinealoma. After the operation hydrocephalus improved. The patient had radiotherapy of 5090 rad. CT scan taken after the irradiation revealed reduction of the size of the tumor. On August 30, 1983, a ring calcification of epidural hematoma in the right parietal region was noticed on CT and plain skull X-rays. He was readmitted because of headache. There was no history of head injury. The calcified epidural hematoma was totally removed on December 12, 1983. The extirpated calcified epidural hematoma was 7.0 X 7.5 cm and 2.5 cm in thickness. Capsule formation was observed and ossification was also seen at dural side. No inflammatory finding was seen on histological examination. The postoperative course was uneventful. Etiology of calcified intracranial hematoma was discussed in relation to the present report, the relevant literature reviewed.