Brain tumor
Table:
Brain tumor
Other names	Intracranial neoplasm, brain tumour

Brain metastasis in the right cerebral hemisphere from lung cancer, shown on magnetic resonance imaging
Specialty	Neurosurgery, oncology
Symptoms	Vary depending on the part of the brain involved, headaches, seizures, problem with vision, vomiting, mental changes[1][2]
Types	Malignant, benign[2]
Causes	Usually unknown[2]
Risk factors	Neurofibromatosis, exposure to vinyl chloride, Epstein–Barr virus, ionizing radiation[1][2][3]
Diagnostic method	Computed tomography, magnetic resonance imaging, tissue biopsy[1][2]
Treatment	Surgery, radiation therapy, chemotherapy[1]
Medication	Anticonvulsants, dexamethasone, furosemide[1]
Prognosis	Average five-year survival rate 33% (US)[4]
Frequency	1.2 million nervous system cancers (2015)[5]
Deaths	229,000 (2015)[6]

Based on the table, state whether the hypothesis is entailed, neutral, or refuted. Provide the verdict inside {"answer": "YOUR ANSWER"} as JSON.

Assertion: A brain tumor can be removed at points in time.

answer: neutral