4yearspostopmicrofractureknee surgerywheniworkoutmy knee swells up got an mri have a small piece of cart in there pain when i run prp inject suggested?

See your Doctor: You need another evaluation and probable endoscopic surgery by a qualified Doctor. A piece of cartilage may be loose in the joint, or may indicate a type of bone fracture or injury. As a Radiologist I see more joints than almost every other Doctor in the USA. PRP treatment at this time is pretty useless and a waste of time. Patients have the same results with or without it.