<prompt> True statement about pyelonephritis in children:Neonates can have non-specific symptomsFlank pain a common findingShould be suspected in all children 2 years of age with fever due to unknown causeAll of these  <response>: Ans. D. All of theseAcute pyelonephritis is considered one of the most serious bacterial infections, especially in children 2 years of age having fever due to an unknown cause. Children with acute pyelonephritis often have severe flank pain, fever, nausea and vomiting. Neonates can however present with non-specific symptoms. 