Atresia of Urethra, also known as urethral atresia, is related to vacterl association, x-linked, with or without hydrocephalus and lower urinary tract obstruction, congenital. An important gene associated with Atresia of Urethra is FOXF1 (Forkhead Box F1). Affiliated tissues include kidney and colon, and related phenotypes are renal insufficiency and vesicoureteral reflux