Final answer:
Cryptorchidism is the likely diagnosis for a newborn male with no palpable testes; an ultrasound is typically the next step if the testes are not in common ectopic locations. Surgery called orchiopexy is recommended between 6 months and 1 year.
Step-by-step explanation:
A newborn male with no palpable testes might be diagnosed with cryptorchidism, which is a condition where one or both testes fail to descend into the scrotum normally. The testes are usually located within the inguinal canal or the abdomen if not palpable in the scrotum. The next best test if testes cannot be located in their most common ectopic locations is an ultrasound followed by magnetic resonance imaging (MRI) if necessary. Surgery, known as orchiopexy, is generally recommended to reposition the testes into the scrotum, and the timing of surgery can be key. It is often performed between 6 months to 1 year of age to prevent complications like infertility or testicular cancer.