Fig. 17

Leydig’s cell hyperplasia. A 34-year-old male presenting with infertility underwent testicular US exam for primary evaluation. a Gray-scale US image shows several hypoechoic lesions scattered throughout the parenchyma in both testes. The largest lesion was in the right testis (arrows). Both testes were deemed to be small in size when patient’s age was considered. b Color Doppler US image demonstrates intense vascularity within the largest lesion. Provisional diagnosis of Leydig’s cell hyperplasia was made. Genetic analysis confirmed Klinefelter’s syndrome