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).

Synonyms: Cancer, Infratentorial, Infratentorial Neoplasms, Posterior Fossa Tumor, Malignant Infratentorial Neoplasm, Malignant Infratentorial Neoplasms, Infratentorial Neoplasms, Malignant, Infratentorial Tumor, Neoplasm, Posterior Fossa, Infratentorial Neoplasm, Malignant, Tumor, Posterior Fossa, Infratentorial Neoplasms, Benign, Tumors, Infratentorial, Benign Infratentorial Neoplasms, Infratentorial Neoplasm, Benign, Posterior Fossa Neoplasm, Infratentorial Cancers, Neoplasms, Infratentorial, Neoplasms, Malignant Infratentorial, Neoplasm, Infratentorial, Tumor, Infratentorial, Cancers, Infratentorial, Benign Infratentorial Neoplasm, Tumors, Posterior Fossa, Neoplasm, Benign Infratentorial, Neoplasms, Benign Infratentorial, Infratentorial Neoplasm, Posterior Fossa Tumors, Neoplasms, Posterior Fossa, Infratentorial Cancer, Infratentorial Tumors, Neoplasm, Malignant Infratentorial, Posterior Fossa Neoplasms