"Gliomatosis" Natural Recordings by Native Speakers
Gliomatosis is a rare central nervous system neoplasm in which gliomatous cells infiltrate and involve a large portion of the brain, often sparing the cerebellum, brainstem, and spinal cord. It is a type of glioma, which is a tumour that originates in the glial cells of the brain.
Gliomata refers to a plural noun that means "gliomas", which are types of brain tumors that arise from the glial cells of the central nervous system.