Figure 2

Transverse scan of a patient's left testis. Upper left: The b-mode image shows the worm nest (arrow) in para-testicular location with the cursor (blue line) positioned for the following m-mode image. Upper right: In the m-mode image the body wall (arrow) of the adult worms is detectable as double layers in form of wavy bands. The corresponding video image can be seen as Additional File 4: Movie2A.mpg. Middle left: The same worm nests as above. In contrast to the worm nest seen in fig. 1 this worm nest is smaller and contains less lymphatic fluid. Middle right: The Colour power Doppler-mode shows clearly less red signals than in Fig. 1 (middle right, or movie 1B). The corresponding video image can be seen as Additional File 5: Movie2B.mpg. Lower left: The same worm nests as above. The caliper for the PWD is positioned where the worm nest is located. Lower right: The following PWD confirms the fact that this worm nest is smaller than the one Fig. 1, as documented by lower peaks, again characterized by the irregular undulating band in contrast to pulsating amplitudes caused by arteries. The corresponding video image can be seen as Additional File 6: Movie2C.mpg.