<prompt> Diamond sign is seen inZenkers diveiculumMorgagni herniaCHPSBochdalek hernia  <response>: Diamondsign is a transient triangular tent-like cleftniche in the middle of the pyloric canal, Seen in case of Congenital Hyperophic Pyloric Stenosis . Congenital hyperophic pyloric stenosis :- - usually presents around 3-12 weeks of age; as non bilious vomiting in a 1st born male - IXOC - USG - On USG appears as - target sign cervix signantral nipple sign Other signs seen in CHPS :- - string sign - diamond sign - mushroom sign 