Multicystic Dysplastic Kidney

Multicystic Dysplastic Kidney is a condition affecting the kidneys, where one kidney develops abnormally with multiple cysts and does not function properly. This happens during fetal development, leading to a kidney that is enlarged but unable to filter blood or produce urine effectively. Usually, only one kidney is affected, and the other kidney compensates to maintain overall kidney function. The condition is often detected before birth through prenatal ultrasound. It can cause concerns about kidney health and may affect blood pressure or urinary function if complications arise. Monitoring is important to ensure the healthy kidney remains functional.

Multicystic Dysplastic Kidney (MCDK) is a congenital renal malformation characterized by the presence of multiple non-communicating cysts of varying sizes replacing normal renal parenchyma, resulting in a nonfunctional kidney. It arises from abnormal interaction between the ureteric bud and the metanephric mesenchyme during embryogenesis, leading to disrupted nephron development and dysplasia. The affected kidney typically lacks a normal collecting system and is replaced by cysts lined by dysplastic epithelium. MCDK is usually unilateral and sporadic, with the contralateral kidney undergoing compensatory hypertrophy. It is a major cause of pediatric renal cystic disease and can be associated with other urinary tract anomalies. The condition is significant due to potential risks of hypertension, infection, or rarely malignancy in the dysplastic kidney.