Pineal Region Mass
Tumor arising in or near the pineal gland area, including germinomas, pinealocytomas, and other rare entities.
Full Definition
A pineal region mass refers to any neoplastic lesion arising within or adjacent to the pineal gland, located in the posterior third ventricle. These masses encompass a diverse group of tumors including germ cell tumors (germinomas, non-germinomatous germ cell tumors), pineal parenchymal tumors (pinealocytomas, pineoblastomas), and other rare entities. Due to their deep midline location, these lesions often present with obstructive hydrocephalus and may cause Parinaud syndrome. In clinical documentation, the differential diagnosis is broad and often requires tissue sampling or specific tumor markers for accurate classification. The location presents significant surgical challenges requiring specialized neurosurgical expertise.
Usage
Usage note: Encompasses diverse tumor types; location often causes hydrocephalus and distinctive symptoms.
In Context
- "The 15-year-old patient presented with hydrocephalus secondary to a pineal region mass." — Emergency department note
- "Biopsy of the pineal region mass confirmed the diagnosis of germinoma." — Pathology report