Anorchia is a medical condition characterized by the lack of testes in males. This condition is rare and can have significant implications for individuals with the condition. There are a few different synonyms for anorchia, including testicular agenesis, testicular aplasia, and anorchism. These terms are generally used interchangeably to describe the same condition. Some of the causes of anorchia include chromosomal abnormalities, genetic mutations, and injury or trauma to the testes. The condition can also be related to certain medications or radiation exposure. Treatment options for anorchia typically involve hormone replacement therapy to compensate for the lack of testosterone production.