Morel-Lavallée Lesion of the Knee in a Recreational Frisbee Player

Figure 3

Using a linear transducer (Philips L12–3 MHz) an area of homogenous anechoic fluid collection with scattered hyperechoic substance () between subcutaneous tissue () and superficial quadriceps fascia (arrows) was visualized. Long-axis middle suprapatellar view (a), long-axis medial suprapatellar view (b), short-axis medial suprapatellar view (c), and compressible fluid collection in short-axis suprapatellar view (d). Patellae (P) and vastus medialis oblique muscle (VMOM) look unremarkable with no signs of prepatellar bursal enlargement.

(a)

(b)

(c)

(d)