The difference between intracranial cysts and brain tumors: in origin, intracranial cysts, are formed due to congenital developmental abnormalities; while the cause of brain tumors is currently unknown, and may be related to genes, heredity, and radiation, chemical viral infections. In terms of composition, intracranial cysts content is cerebrospinal fluid and the wall of the cyst is arachnoid membrane; whereas brain tumors, are formed by the proliferation of brain parenchymal cells. In nature, intracranial cysts are benign lesions; while brain tumors are benign, and malignant tumors. In terms of treatment, intracranial cysts usually have no obvious symptoms, so most of them don’t need special treatment. If the cysts rupture, bleed, or cause space-occupying lesions, they need surgical treatment; whereas most of the brain tumors need surgery, and if the tumors are malignant, they are likely to need radiotherapy and chemotherapy as well.