Chronic pyelonephritis REF: Chandrasoma Taylor 3rd/e p. 725, table (49.2), Textbook of Pathology by Datta page 567, Harrison's 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.