Multicystic dysplastic kidney (MCDK) is a congenital maldevelopment in which the renal cortex is replaced by numerous cysts of multiple sizes. A dysplastic parenchyma anchors the cysts, the arrangement of which resembles a bunch of grapes. The calyceal drainage system is absent. Typically, MCDK is a unilateral disorder, the bilateral condition is incompatible with life. Furthermore, MCDK with contralateral renal agenesis does not support life. MCDK can be an incidental finding. They show the typical multicystic appearance of MCDK with little or no parenchyma.Cyst wall calcification may be seen.If a contrast-enhanced CT is performed, there is no excretion seen.The management of MCDK is a controversial topic. Routine nephrectomy is not indicated at this time.Surgery is indicated in patients with symptomatic MCDK, suspicious enlargement, hypertension, mass effect, pain, or infection
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