<prompt> Make the diagnosis of a 26 day old Infant presenting with recurrent nonbilious vomiting with costipation and loss of wt?Oesophageal atresiaCholedochal cystIleal atresiaPyloric stenosis  <response>: Ans is d ie Pyloric stenosis This is a typical picture of pyloric stenosis a Infant presenting in 4th week b Non-bilious vomitting. c With constipation and wt. loss. Lets see other options. Esophageal atresia a Infant presents soon after bih with complaints of regurgitation of milk, saliva pours almost continuously from its mouth. Attempt to feed are met with Spitting up or frank vomitting. b Persistence in feeding may produce aspiration, choking and respiratory distress. c Diagnosis can be confirmed by passing a rubber catheter into the esophagus through the mouth which will encounter an obstruction. Thus point a helps in ruling out oesophageal atresia. Choledochal cyst a Presentation is not so early in infancy. Though its a congenital anomaly only 12 the cases present before 20yrs. of age and only 13 present in the 1st decade of life. b Classical triad of symptoms -- i Obstructive jaundice ii Upper abdominal pain iii Fever c A palpable epigastric mass may be discovered. Beal atresia a Vomitting will be bilious b Infant presents in the 1st week of life. 