How long does a brain tumor usually live if it is left untreated

The survival time of untreated brain tumor is related to the benign and malignant nature of brain tumor, the growth site and volume of brain tumor, etc. Severe patients may only survive for a few months, while those with milder condition may survive for several years or decades, and the life expectancy is not even affected.
1. The benign or malignant nature of brain tumor will affect the survival time: if the brain tumor is benign, such as most of meningiomas, nerve sheath tumors, etc., its growth is slow, and even 20 years won’t cause obvious clinical symptoms, and at this time, it won’t affect the patient’s life expectancy or the impact is small.
However, if it is malignant tumor, such as fast-growing glioma, it may only survive for about half a year to one year without treatment.
2. The growth site and volume of brain tumor will affect the survival time: if the brain tumor grows in the non-functional area and its volume is small, the time interval between the real growth and the degree of disability and death may be several years. However, if the brain tumor is in important functional areas, such as the brain stem, cerebellum and other locations, or the size is relatively large, it is possible that it will cause respiratory and heartbeat disorders in about half a year, and eventually cause death.
Therefore, after the discovery of brain tumor, it is recommended that the patient should consult the neurology department, neurosurgery department or oncology department in time, and actively treat the tumor under the guidance of the doctor, so as to avoid delaying the condition and causing serious consequences.