Image of the Week: Why is this newborn hypotonic?

A full-term infant male is born to a healthy 32-year-old woman. The newborn examination reveals generalized hypotonia, a distended abdomen with visible peristalsis and thin wrinkled skin, and an empty scrotum. A sweep along the inguinal canals bilaterally indicates that both testes are present. Which of the following is this patient most likely to develop?

The Image of the Week for ...