<prompt> One side of kidney is normal, other side kidney is contracted kidney with scar, what is the most probable diagnosis:Chronic pyelonephritisPolycystic kidneyRenal aery stenosisTuberculosis of kidney  <response>: Chronic pyelonephritis REF: Chandrasoma Taylor 3rde p. 725, table 49.2, Textbook of Pathology by Datta page 567, Harrisons 15th ed p. 1590 Repeat from June 2010 path Differential Diagnosis of a Granular, contracted Kidney with scar is: Chronic Glomerulonephritis Chronic Pyelonephritis Benign Nephrosclerosis Hypeension CHRONIC PYELONEPHRITIS The surface has Saddle shaped scars arrow which corrospond to the parenchymal fibrosis and scarring of the pelvic lining. 