Sudden Infant Death with Dysgenesis of the Testes Syndrome, also known as siddt, is related to sudden infant death syndrome and gonadal dysgenesis, and has symptoms including stridor An important gene associated with Sudden Infant Death with Dysgenesis of the Testes Syndrome is TSPYL1 (TSPY Like 1). Affiliated tissues include testes and spinal cord, and related phenotypes are hypothermia and sleep apnea