<prompt> Which one of the following statements is false with regard to Xanthogranulomatous pyelonephritis in children -Often affects those younger than 8 years of age.It affects the kidney focally more frequently than diffuselyBoys are affected more frequently.Clinical presentation in chidren is same as in adults  <response>: Ans. is a i.e., Often affects those younger than 8 years of age Xanthogranulomatous pyelonephritis is a form of chronic pyelonephritis characterised by destruction of renal parenchyma and the presence of granulomas, abscesses and collection of lipid laden foamy macrophages foam cells. Xanthogranulomatous pvelonephritis in children o Age of presentation ranges from infancy to 16 years. o Focal firm being more common in children Appear healthy. o Those who affected diffusely, present with non-specific symptoms of chronic infection. i Weight loss ii Fever iii Lethargy iv Failure to thrive o Proteus is the most common causative organism. I am not sure about option c. In old ages, xanthogranulomatous pyelonephritis is more common in female, but I cound not find data in children. 