The deadliest form of brain tumor is glioblastoma multiforme (GBM). GBM is an aggressive form of brain cancer that is very difficult to treat. It is the most common malignant brain tumor in adults, accounting for about 15 percent of all primary brain tumors. GBM tumors are fast-growing and have the ability to spread quickly throughout the brain. Treatment options are limited and the prognosis is generally poor.
Symptoms of GBM
The most common symptoms of GBM include headaches, seizures, changes in personality or behavior, weakness, numbness, and vision problems. As the tumor grows, it may cause other symptoms such as nausea, vomiting, and difficulty with balance and coordination.
Diagnosis and Treatment
GBM is usually diagnosed with a CT or MRI scan. The tumor may be biopsied to determine the type of tumor and how aggressive it is. Treatment usually involves a combination of surgery, radiation therapy, and chemotherapy. Depending on the size and location of the tumor, surgery may be an option. Radiation therapy and chemotherapy may also be used to shrink the tumor and slow its growth.
Prognosis
Unfortunately, the prognosis for GBM is generally poor. The average survival time for patients is between 12 and 15 months. Treatment can prolong survival but the tumor usually recurs. Even with aggressive treatment, the average survival time is only two to three years.