Infratentorial Neoplasms

**Definition:** Intracranial tumors originating in the region of the brain inferior to the TENTORIUM CEREBELLI, which contains the cerebellum, FOURTH VENTRICLE; CEREBELLOPONTINE ANGLE; BRAIN STEM, and related structures. Primary tumors of this region are more frequent in children, and may present with ATAXIA; CRANIAL NERVE DISEASES; vomiting; HEADACHE; HYDROCEPHALUS; or other signs of neurologic dysfunction. Relatively frequent histologic subtypes include TERATOMA; MEDULLOBLASTOMA; GLIOBLASTOMA; ASTROCYTOMA; EPENDYMOMA; CRANIOPHARYNGIOMA; and choroid plexus papilloma (PAPILLOMA, CHOROID PLEXUS).

**Tree numbers:** - C04.588.614.250.195.411 - C10.228.140.211.500 - C10.551.240.250.400

**Synonyms:** - Neoplasms, Infratentorial - Infratentorial Tumors - Posterior Fossa Neoplasms - Neoplasms, Posterior Fossa - Posterior Fossa Tumors