neuroepithelial neoplasm pineal body neoplasm pineal parenchymal cell neoplasm tumor of pineal gland pineocytic tumour pineocytic tumor pineal parenchymal neoplasm MONDO:0024890 pineal parenchymal cell neoplasm pineocytic neoplasm pineal parenchymal cell tumour pineal gland neoplasm ICDO:9360/1 pineal gland tumor neoplasm of pineal gland tumor of the pineal gland NCIT:C6965 pineal parenchymal tumor pineal parenchymal tumour tumour of the pineal gland tumour of pineal gland A neoplasm arising from the pineocyte, a cell with photosensory and neuroendocrine functions. It may be composed of mature elements or primitive, immature cells. The cellular composition determines the biological behavior and clinical outcome. Three types are recognized: pineoblastoma, pineocytoma, and pineal parenchymal tumor of intermediate differentiation (Adapted from WHO.) pineal gland tumour pineal parenchymal cell tumor neoplasm of the pineal gland