Hello, I would very much agree with your decision to get yourself evaluated as soon as possible. With the presentation you are describing with pain running down your knee to the ankle, i feel that, this is doubtfully a bursitis. I would not jump to a conclusion of cancer, though that is, never the less a part of the differential list for you. You should be evaluated for pathologies of hip and lower back with neurological involvement. As we don t have a clear cut idea of what is going on till we reach a definitive diagnosis. I don t think there is any other way than painkillers and antiinflammatory medications to keep pain under control till now. Or you may get a proscription of opiod painkillers under supervision on your family physician. And try to avoid painful positions and habits. Hope this helps ! Best wishes for recovery. Dr. Shirish Sachdeva Consultant Orthopedic & Neurological Physical Therapy & Rehabilitation lifestyle Medicine Counselor