<prompt> all the following about xanthogranulomatous pyelonephritis are true exceptOn cut section yellowish nodules are seenAssociated with tuberculosisFoam cells are seenGiant cells are seen  <response>: As discussed in text ,xanthogranulomatous pyelonephritis is associated with E.coli Proteus metabolism, pseudomonas, streptococcal faecalis, and klebshiella Refer robbins 8943 