A palm thorn penetrated my knee about a month ago. Though I never had arthritis before, I now have a mild case in my right knee, puncture healed, tetanus shot next day, no warmth or swelling--just light arthritis. Ultrasound showed nothing. My GP does not know what to do. I live in Maui, HI, and no doctor here for it. I can fly anywhere to get this taken care of. Who would be the best doctor to see?
Dear patient Thorn prick cannot lead to arthritis of knee joint. It can only lead to foreign body reaction an around thorn which is painful.  Thorn was removed from knee or its still lying inside? If not removed it may be lying inside. I would like to advise MRI of the knee joint to confirm diagnosis. MRI also helps in ruling out other knee pathology and also identifies thorn if left inside joint. Visit radiology center nearby you and get it done. You need to consult expert arthroscopic surgeon nearby you with report. All the best.