In hydrocephalus caused by brain tumor, patients may have headache, weakness in both lower limbs, unstable gait when walking, and memory loss. As the disease progresses and worsens, the patient may also experience incontinence and unresponsiveness. Hydrocephalus caused by brain tumor can be treated conservatively by applying drugs for dehydration and reducing intracranial pressure, such as mannitol, glycerol fructose, furosemide and, if necessary, albumin. If conservative medical treatment is not effective, the patient can be treated surgically if necessary, including resection of brain tumors. If the patient still has hydrocephalus after surgery, subsequent treatment such as abdominal drainage of hydrocephalus can be performed. Oral medications to reduce cerebrospinal fluid secretion, such as acetazolamide, should also be given to the patient.