recurrent knee swelling

Recurrent knee swelling Chief Complaints 28 years old male non_diabetic, euthyroid present with recurrent knee swelling ( right knee) since 4 years. 1 episodes a year usually at this time and subsides spontaneously without any medication. On examination ROM normal,, tenderness negative, pattelar tap positive. What can be the causes? Diagnosis and treatment



Need evaluation Xrays CBC esr RA factor Uric acid Crp Mantaux test Chest xray Reassess after reports