pediatrics
Renal Anomalies
Multicystic dysplastic kidney (MCDK)
In this condition, there is a nonfunctioning renal unit consisting of noncommunicating cysts with intervening solid tissue composed of fibrosis, primitive tubules, and foci of cartilage. Usually, ureteral atresia is also present. The contralateral kidney is usually normal, but up to 10% of patients may have Vesicoureteral Reflux (VUR) or ureteropelvic junction obstruction. Frequently, the kidney progressively involutes and eventually is no longer visible on ultrasonography. Development of tumors, infection, and/or hypertension is rare. Most experts recommend observation to monitor for involution. Nephrectomy may be considered for the presence of solid tissue, progressive enlargement, or rarely hypertension or a ruptured cyst that is causing pain. 