Figure 2
A 10-year-old girl with unilateral knee pain who was eventually diagnosed as bilateral Osgood-Schlatter disease and patellar tendinitis on the symptomatic side. Comparative power Doppler ultrasound evaluations (longitudinal view) demonstrate cortical irregularities at the insertion site of the patellar tendon (P) on the tibia (T) bilaterally. There is also abnormal power Doppler signal on the patellar tendon (left image). The Hoffa's fat pad (H) is normal on both sides.