This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nephropathy, Subject name: Pediatrics
Unilateral renal agenesis is associated with 
Select and explain. 
A. Polycystic disease of pancreas, B. Hiatus Hernia, C. Single umbilical artery, D. Hypogonadism
C: Single umbilical artery
Answer: C: Single umbilical artery 
Explanation: Ans. is 'c' Single Umbilical Artery Nelson says "Incidence of unilateral Renal Agenesis is increased in Newborns with a single umbilical artery "Other associated malformations with U/L renal agenesisAbsent ureterContralateral vesicoureteric refluxAbsent Ipsilateral vas deferensNow something about bilateral renal agenesisBilateral Renal agenesis is incompatible with extrauterine life, death occurs shortly after birth from pulmonary hypoplasia.Bilateral renal agenesis is also known as Potter syndrome*