We report about an infant boy who was born without complications after an unproblematic pregnancy. During the first clinical examination we found him to have an enlarged scrotum on the right side containing a solid, painless mass. High-resolution ultrasound showed no distinctive findings. Surgical exposure of the testicle revealed extravaginal torsion resulting in hemorrhaging infraction. Histological examination confirmed that intrauterine testicular torsion had occurred 3 to 4 days prior to birth. Since standard examinations including ultrasound and laboratory chemistry are not helpful in establishing a differential diagnosis of testicular disorders in newborns, immediate exposure is recommended.