<prompt> IVP of polycystic kidney disease shows:Cobra headDropping lillyFlower base appearanceSpider leg deformity  <response>: Ans: D Spider leg deformity The calyces are enlarged stretched over the cysts, which look like legs of a spider; hence called spider leg deformity- Textbook of Surgery by 5 Das 5th1155Autosomal Dominant Polycystic Kidney DiseaseMorphologyThe disease is universally BL the both kidneys are grossly enlarged , with multiple cyst studding the surface of the kidney.The cyst are spherical, vary in size from a few imltimeters to centimeters, are distributed evenly throughout the cortex medulla. Only 1 to 5 nephron will develop cysts.The cyst contain straw coloured fluid that may become haemorrhagic.Genetic ConsiderationOver 90 of cases are inherited as an AD-trait , with the remainder likely representing spontaneous mutations. Two form of ADPKD has been identified.ADPKD-1 accounts for 85 of cases the gene has been mapped to chromosome 16p13.3. ADPKD-2 accounts for remainder cases the gene has been mapped to chromosome 4q 21-23.ADPKD-2 appear to have a later age of onset of symptoms renal failure than ADPKD-1.Radiological Feature Rim Cresent Sign HydronephrosisSoap Bubble appearanceHydronephrosisSpider leg appearancePolycystic kidneyFlower vase appearance of ureterHorse shoe kidneyDrooping flower appearanceEctopic ureterCobra head appearanceUreterocoeThimble biadderTubercular cystic chronicSandy patchesSchistosomiasis of bladderFish hook bladderBPH 