Figure 3: Transcutaneous ultrasonograms of a transverse section of the ventral hip region showing (a) the luxated femoral head and (b) the contralateral normal one in caudodorsal coxofemoral luxation. 1 Acetabulum, 2 Adductor muscle, 3 Femoral head, 4 Semimembranous muscle. Bar = 2 cm.