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NCI Dictionary of Cancer Terms

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pineal region tumor  listen  (PIH-nee-ul REE-jun TOO-mer)

  A type of brain tumor that forms in or around the pineal gland (a tiny organ near the center of the brain). Pineal region tumors may be benign (not cancer) or malignant (cancer). They include pineocytomas, pineoblastomas, and pineal germinomas. Also called pinealoma.