Figure 19.

Ultrasound examination of patellar and quadriceps tears. A: Longitudinal ultrasound image obtained in the midline, demonstrating the anterior knee, quadriceps tendon with its insertion to the patella, suprapatellar recess, and the patella. No effusion is visible; B: Longitudinal view. Complete quadriceps tendon tear. This 62-year old physician suffered direct trauma to his right knee when falling down stairs; C: Quadriceps tendinitis with calcification of the right knee. This 50-year old man had a contusion with hematoma of the quadriceps muscle one year ago.