Absent kidney

Absent kidney can be due to surgical removal (nephrectomy), or it can also occur genetically and is then called renal agenesis.Renal agenesis is a condition when the kidney never formed during fetal development. Agenesis is usually unilateral and is not a major health concern as long as the other kidney is healthy. It is usually detected during prenatal ultrasounds. Bilateral agenesis is rare and would be detected prenatally or at birth.