<prompt> Spider leg sign on IVP suggests?Renal stonePolycystic kidneyHypernephromaHydronephrosis  <response>: Ans. b Polycystic kidneyAlso Know Driven snow appearance - Pindborg s tumor Sunray appearance - Osteogenic Sarcoma , Ewing Sarcoma Floating Water Lily sign - Lung Hydatid , Echinococcus Popcorn calcification - Pulmonary Hamartoma Honeycomb appearance - RA , Scleroderma , Interstitial Lung Disease Egg shell calcification - Sarcoidosis , Silicosis , Lymphoma , T.B., Histoplasmosis Spring water cyst Pluero Pericardial cyst Rib notching - Neurofibromatosis , Aortic Aneurysm, Taussig-Bing Operation , Aortic obstruction , Coarctation of aorta. Coeur en Sabot, Flask shape heart - TOF Candle wax sign -Melorheostosis Football Sign - Pneumoperitoneum Snowman Sign - TAPVC Total Anomalous Pulmonary Venous Connection Figure of 8 in CXR - TAPVC Egg on side - Uncorrected TGV Thumb Print Sign - Epiglotis , Ischemic Colitis I Double bubble sign - Duodenal Atresia Single bubble sign - Pyloric stenosis Soap bubble appearance - Meconium ileus Meniscus appearance - CBD stone on cholangiography Central dot sign - Caroli s disease Chain of lakes appearance - Chronic pancreatitis Spongy appearance with central sunburst calcification sign - serous cyst adenoma Rim sign in IVP - Hydronephrosis Cobra head deformity - Ureterocele BL spider leg sign - Polycystic Kidney Golf hole ureter - T.B. Flower Vase pattern of pelvis in IVP - Horse shoe kidney 