<prompt> Olive shaped mass on feeding is pathognomonic of:Hypertrophic pyloric stenosisDuodenal atresiaJejuna atresiaIleal stenosis  <response>: Ans. a Hypertrophic pyloric stenosisRef: Sabiston 20th Edition, Page 1869 If olive shaped mass is palpable then no other investigation is needed to confirm the diagnosis Even USG is not needed 