Figure 20b. Surgically proved rupture of tunica albuginea in a 34-year-old man who was struck in the groin. (a) Transverse oblique US scan of testis reveals a heterogeneous mass (arrow) in the inferior pole. (b) Color Doppler flow US scan reveals focal absence of blood flow in the tunica vasculosa (arrow), suggestive of tunica albuginea fracture. There was associated hematoma of the epididymis as well.