<prompt> Gross morphology of kidney cut surface is shown below. What is your likely diagnosis?Autosomal dominant polycystic kidney disease ADPKDAutosomal recessive polycystic kidney disease ARPKDMulticystic renal dysplasiaMedullary sponge kidney  <response>: Autosomal dominant polycystic kidney disease ADPKD Gross appearance, the kidneys are bilaterally enlarged and may achieve enormous sizes; weights as much as 4 kg each. External surface - composed of a mass of cysts, up to 3 to 4 cm in diameter, with no intervening parenchyma. 