Experience with pineal region tumors

Abstract

The results are reported of a retrospective review of the presentation and outcome of 43 pineal region tumors treated from 1982 to 1996, including 20 identified tumors: 5 germinomas, 8 teratomas, 2 embryonal carcinomas, 1 endodermal sinus tumor, 2 pineocytomas and 2 pineoblastomas. Of the 43 tumors reviewed, 36 were located in the pineal region, 5 in the suprasellar, and 2 in both the pineal and suprasellar regions. Twenty patients underwent surgical resection: total in 6 and partial in 10, while only a biopsy was taken in 4 cases. Fifteen patients were managed on the basis of serum CSF tumor markers and radiation response. Twenty-three patients with germinomas received radiotherapy (RT) and had a 5-year survival rate of 87%. Fifteen patients with non-germinomatous germ cell tumors received RT and chemotherapy following direct surgery, and 5 died (mortality rate of 33.3%). The overall survival rate of the 43 patients with pineal tumors was 79.1% (34/43) and the death rate was 20.9% (9/43). It is now recognized that the wide variety of tumor types found in the pineal region necessitates different modes of treatment, and improved microsurgical and stereotactic surgical techniques have made mortality and morbidity rates acceptably low. Because the radiation response and CSF cytology are not enough to determine optimum treatment, a tissue diagnosis should be obtained in all patients.