Testicular microlithiasis and subsequent development of metastatic germ cell tumor.

of testicular microlithiasis.Fig. 1-25-year-old man with testicular microlithiasis and subsequent germ cell tumor.A, Longitudinal sonogram of left testis reveals punctate, echogenic, nonshadowing foci representing testicular microlithiasis.Note microliths are concentrated in lower pole.B, Longitudinal sonogram of left testis taken 15 months later shows hypoechoic germ cell tumor (arrows), with cystic region, in lower pole.Microliths are displaced by mass.