A 23-year-old pregnant female presents for evaluation of prenatally detected unilateral hydronephrosis. There is no oligohydramnios. What would be your consideration and recommendation to the patient?
Prenatal fetal hydronephrosis is the most commonly diagnosed fetal urologic abnormality. While the overall incidence of hydronephrosis on prenatal sonography is between 1% and 1.5%, the incidence of clinically significant hydronephrosis is between 0.2% and 0.4%. With normal amniotic fluid levels, close follow-up throughout the pregnancy and in the neonatal/newborn period as well as through the first year of life are required. The majority of cases of prenatal low-grade hydronephrosis may stabilize and resolve within the first year of life.