I have had severe pain in my left knee for 8 months now. Seen a orthopedic and was diagnosed as patella tendonitis and prescribed medication and physiotherapy . Followed the regime religiously but no result. Visited a neurologist and under went MRI of lower back, NCV and EMG test which turned out to be are normal. Don t know what to do, my right thigh has shrunk by 4 cm. I am loosing strength in my right leg.