My father is diagnosed with low grade astrocytoma in right frontal lobe. He is 57 years old. The doctors advised there will be no difference observed with or without surgery, the also made me understand the complications after the surgery, they left the decision on me. My father is not suffering from any symptoms, he is normal right now completely except some physical weakness.
Is it safe enough to go without operation? And if it is, how long it is safe?