Name the congenital abnormality! ⚠️

This congenital abnormality typical occurs within the first trimester of pregnancy, do you know what it is? Hint 1: This occurs in 15% of females with Turner’s syndrome and is also associated with Edward’s syndrome (trisomy 18). Hint 2: This malformation is frequently asymptomatic however 70% of adults experience abdominal pain, nausea, kidney stones or UTIs. Image credit - https://radiopaedia.org/cases