Brain Diseases [Disease/Finding] Brain Neoplasms [Disease/Finding] D001932 Brain Neoplasms Brain Neoplasms Brain Tumors 1025641 189537005 C1396 M0002885 Neoplasms of the intracranial components of the central nervous system, including the cerebral hemispheres, basal ganglia, hypothalamus, thalamus, brain stem, and cerebellum. Brain neoplasms are subdivided into primary (originating from brain tissue) and secondary (i.e., metastatic) forms. Primary neoplasms are subdivided into benign and malignant forms. In general, brain tumors may also be classified by age of onset, histologic type, or presenting location in the brain. Neoplasms, Brain 126952004 N0000000609 C0006118 Central Nervous System Neoplasms [Disease/Finding]