<unk>  is an uncommon and partial form of a spectrum of failures of abdominal and pelvic fusion in the first months of embryogenesis known as the exstrophy -<unk>  complex. While<unk>  is inherent in all cases of exstrophy it can also, much less frequently, appear in isolation as the least severe form of the complex spectrum. It occurs as a result of defective migration of the genital tubercle primordii to the cloacal membrane, and so malformation of the genital tubercle, at about the 5th week of gestation.
Epispadias
Bifid penis
Webbed penis
Hypospadias
Shawl scrotum
Urachal fistula
Bladder exstrophy
Sacral dimple