Fig. 1.
B-mode (right side of figure) and contrast-enhanced ultrasonographic (CEUS, left side) images of left testis of patient #1. The white dot denotes a small hypo-echoic lesion suspicious of neoplasia in the B-mode scan. However, CEUS does not reveal any enhancement of air bubbles in the corresponding region, and thus the presence of a testicular tumour was excluded.