Causes of an empty scrotum include:
- maldescended testes
- retractile testes
- testicular atrophy (trauma, mumps, Klinefelter's syndrome, Kalman's syndrome, Noonan's syndrome)
- ambiguous genitalia
- testicular agenesis - accounts for about 5% of testes that are not palpable
The scrotum is hypoplastic if it has never contained a testis.
Last reviewed 01/2018