]> 2013-05-25T09:57:29-07:00 Pinealoma 2007-10-05T00:00:00 uncurated DeVita et al., Cancer: Principles and Practice of Oncology, 5th ed, p2064; Adams et al., Principles of Neurology, 6th ed, p670 Neoplasms which originate from pineal parenchymal cells that tend to enlarge the gland and be locally invasive. The two major forms are pineocytoma and the more malignant pineoblastoma. Pineocytomas have moderate cellularity and tend to form rosette patterns. Pineoblastomas are highly cellular tumors containing small, poorly differentiated cells. These tumors occasionally seed the neuroaxis or cause obstructive HYDROCEPHALUS or Parinaud's syndrome. GERMINOMA; CARCINOMA, EMBRYONAL; GLIOMA; and other neoplasms may arise in the pineal region with germinoma being the most common pineal region tumor (MeSH). birnlex_12634 Pinealoma 2009-05-29T00:00:00 Primary nervous system neoplastic disease Pinealocytoma Pineocytoma Pineal Parenchymal Tumor Pineal Tumor Pineoblastoma Pineal Neoplasm Primary nervous system neoplastic disease Synonym SuperCategory ModifiedDate Label Id MeSH DefinitionSource Definition DefiningCitation CurationStatus Created