Which one of the following statements is false with regard to Xanthogranulomatous pyelonephritis in children -

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.