Clarke’s Test Modified is an orthopaedic test of the knee that assess the patellofemoral joint. A positive test can indicate signs of chondromalacia patella or degeneration of the patellofemoral joint.


  1. Patient supine with leg straight.
  2. Examiner compresses the quadriceps muscle 2 cm above the superior pole of the patella.
  3. The patient is then instructed to contract the quadriceps muscle.


Contraction of the quadriceps compresses the patella against the femoral condyles.

Positive Clarke’s Test Modified

Retropateltar pain: Chondromalacia patella, degeneration of the patellofemoral joint.

Clinical Notes

Chondromalacia patella causative factors; recurrent patellar dislocation, patella alta and other congenital anomalies, quadriceps muscle imbalance, increased Q-angle at the knee, direct patellar trauma.