The child 1 month old, in the hospital did not find one testicle (even in the inguinal canal and abdominal cavity) and was diagnosed with cryptorchidism, a pediatrician palpate the small testicle, the surgeon sent patient for an ultrasound.
At US second testicle is not visualized (even in the inguinal canal and abdomen), in the scrotum visualized something like the spermatic cord without testicle (unfortunately empty hemiscrotum longitudinal scans have not saved, presumably monorchism) or hyperechoic testicular rudiment.