A teenager with a history of recurrent combined injuries of the one knee, by his words: first he is fell, a few days after he got a strike and there is something out of his knee was jumping... in emergency room he had a Roentgen with diagnosis of Osgood-Schlatter disease, but orthopedist asked to see a ligaments condition on ultrasound... At US in the projection of the distal part of the patellar tendon in the rectified knee position visualized hypoechoic area and even some impression (looks like a partial rupture), but in the bent knee position the ligament becomes uniform echogenicity (anisotropic effect - an ultrasound artifact) and flat shapes. On the DPD in this area visualized increased blood flow (tendonitis of the patellar tendon) and bone fragments of tibial tuberosity (Osgood-Schlatter disease) . Also in the projection of quadriceps tendon on the DPD visualized a small increase in blood flow (tendinitis of the quadriceps tendon), compared with blood flow in the projection of the patellar tendon. In a healthy knee blood flow in these areas, at the same Doppler settings, was not visualized. Files: 1 anisotropic effect of patellar tendon in the rectified knee position 2 almost complete disappearance of this effect when bending the knee 3 DPD - increased blood flow in the distal patellar tendon 4 abruption of bone fragments of tibial tuberosity 5 DPD - increased blood flow in the quadriceps tendon external link | 
