Oeis Complex, also known as omphalocele-exstrophy-imperforate anus-spinal defects, is related to cloacal exstrophy and bladder exstrophy and epispadias complex. An important gene associated with Oeis Complex is MNX1 (Motor Neuron And Pancreas Homeobox 1). Affiliated tissues include colon and uterus, and related phenotypes are hydrocephalus and cryptorchidism