<prompt> A previously healthy infant presents with a recurrent episode of abdominal pain. The mother says that the child has been passing an altered stool after episodes of pain, but gives no history of vomiting or bleeding per diagnosis -rectum. Which of the following is the most likely diagnosisRectal PolysIntussuceptionMeckels DiverticulumNecrotizing Enterocolitis  <response>: The infant in question has:Recurrent episodes of abdominal painPassing of altered stools after episodes of painNo vomiting or bleeding per rectum.Most common presentation of rectal polyps and Meckels diverticulum is painless rectal bleeding option a c are ruled outNecrotizing enterocolitis is seen in premature infants and is manifested in neonatal period. Symptoms progress from abdominal distension, vomiting, lethargy, poor feeding to passage of grossly bloody stool and features of shock option d is excludedNow we are left with intussusception. Most common presentation is recurrent abdominal pain Paroxysmal clock pain offer severe.The absence of history of bleeding per rectum is creating some confusion here.However, the altered stool should raise the suspicion of intussusception because intussusception typically presents with currant jelly- stool altered stool representing a mixture of blood, mucus and stool.So, amongst the given options, best answer is intussusception. 