What is the term for the condition where there is an absence of one or both testis due to failure to migrate?

The condition characterized by the absence of one or both testis due to failure to migrate from the abdominal cavity into the scrotum is known as cryptorchidism. During normal fetal development, the testes form in the abdominal cavity and typically descend into the scrotum before birth. When this process is incomplete, cryptorchidism occurs, which can lead to potential complications such as fertility issues and an increased risk of testicular cancer if left untreated.

Hydrocele refers to a fluid collection around the testicle, orchitis is inflammation of the testicles often due to infection, and varicocele involves the enlargement of veins within the scrotum. None of these terms describe the absence of the testis resulting from migratory failure, making cryptorchidism the correct and appropriate term for this condition.