Pineal region tumor epidemiology
Pineal region tumors (PRTs), which are rare tumors, account for approximately 0.4-1.0% of intracranial tumors.
Pineal parenchymal tumors (PPTs) are even rarer, and approximately 30% of PPTs occur in neoplasms of the pineal region 1).
Over the age of 40 is more likely to be a meningioma or a glioma.
Tumors in this region are more common in children (3–8% of pediatric brain tumors) than in adults (≤1%). 2)
Over 17 tumor types occur in this region 3).
Pineal germinoma is the most common tumor (21– 44% in American/European population, 43–70% in Japan), followed by pineal astrocytoma, pineal teratoma and pineoblastoma 4).
Many tumors are of mixed cell type.
Germ cell tumors (GCT), ependymomas and pineal cell tumors metastasize easily through the CSF (“drop metastases”).