Longitudinal scan of the medial part of the right knee joint of a 5-year-old girl. FEM—ossified part of the medial femoral condyle (MFC); TIB—ossified part of the medial tibial condyle (MTC); hollow star—cartilaginous part of MFC; white star—cartilaginous part of MTC; asterisk—medial meniscus; arrows—deep part of medial collateral ligament (a meniscal-femoral ligament); arrowheads—the superficial (proper) part of the medial collateral ligament. Linear probe 3–12 MHz.