<s>[INST] I am look for information regarding metastatic brain tumors. I have a history of kidney cancer and I am currently experiencing the following symptoms: numbness/burning in right foot, numbness in lower right back, headaches, dizziness , memory loss , nose bleeds , tracer lights in my eyesight, loss or low left quad functions. I had surgery on my left knee(faulkeson procedure) on 1 NOV have not retain consistent function in my left quad. [/INST] Hi, Welcome to Chat Doctor, It seems that you have got primary cancer in your kidney and now there is metastasis in your brain. From primary focus cancer cells travels in various parts or organs of the body and there is deposition of cancer cells producing another tumor, this is called, metastatic tumor. In your case this tumor in the brain presses upon brain tissues causing pressure symptoms. Problems you are having are due these pressure in brain tissues. Consult cancer surgeon, and he will start radiation therapy and chemotherapy accordingly. Ok and bye. </s>