Chondromalasia patella is inflammation of the underside of the patella and softening of the cartilage. Patellar tracking disorder means that the kneecap (patella) shifts out of place as the leg bends or straightens.It can shift in either direction.  You will need a long-arm goniometer. Place the centre of the goniometer over the centre of the patella and position the bottom arm in line with the patella tendon and tibial tuberosity. Next position the upper arm so that it is pointed directly at the anterior inferior iliac spine of the ilium (point to which rectus Femoris attaches). The small angle of the goniometer is the Q angle.