<prompt> Regarding congenital hypertrophic pyloric stenosis true statement is:On feeding an olive mass palpated in epigastric regionOn nonfeeding a mass is palpated in right upper quadrantMass is felt in umbilical regionA palpable mass is seen in right iliac fossa  <response>: Ans. b On non feeding a mass is palpated in right upper quadrantRef: Bailey and Love 27th Edition, Page 128Congenital Hypertrophic Pyloric Stenosis Diagnosed by clinical finding During a test feed a visible gastric peristalsis is seen passing from left to right across upper abdomen. In a relaxed baby nonfeeding: Pyloric tumor is palpated as an Olive-shaped mass in right upper quadrant Authors Note: As I Have already told a direct line from Bailey by NBE examiners Diagnosis is confirmed by USG. 