A malignant, invasive embryonal neoplasm arising from the cerebellum. It occurs predominantly in children and has the tendency to metastasize via the cerebrospinal fluid pathways. Signs and symptoms include truncal ataxia, disturbed gait, lethargy, headache, and vomiting. There are four histologic variants: classic medulloblastoma, large cell/anaplastic medulloblastoma, desmoplastic/nodular medulloblastoma, and medulloblastoma with extensive nodularity. The disease is medulloblastoma (MONDO_0007959, a Monarch Disease Ontology identifier). Also known as: brain medulloblastoma, cerebellar medulloblastoma, cerebellum embryonal neoplasm, medulloblastoma, autosomal recessive, autosomal dominant, somatic mutation, medulloblastoma, desmoplastic, autosomal recessive, autosomal dominant, somatic mutation, medulloblastoma, malignant, medulloblastoma, somatic, medulloblastomas.