A 6-month-old baby with H/O bloody diarrhoea of 2 days duration with abdominal distension and on examination the baby screams, diagnosis is –
**Core Concept**
The question is testing the clinical diagnosis of a condition in a neonate presenting with bloody diarrhea, abdominal distension, and a screaming baby. This clinical presentation is suggestive of a severe intestinal infection.
**Why the Correct Answer is Right**
The likely diagnosis is Intussusception, a condition where a part of the intestine telescopes into another part, causing intestinal obstruction and ischemia. The presenting symptoms of bloody diarrhea, abdominal distension, and screaming are characteristic of this condition. The mechanism involves the invagination of the ileum into the colon, leading to bowel obstruction and ischemia, which can cause abdominal pain, vomiting, and bloody stools.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not match the clinical presentation of the case. While diarrhea is a symptom of gastroenteritis, it does not explain the abdominal distension and screaming.
**Option B:** This option is incorrect because it is a condition that typically presents with a history of chronic constipation, not bloody diarrhea and abdominal distension.
**Option C:** This option is incorrect because it is a condition that typically presents with a history of fever, abdominal pain, and vomiting, not bloody diarrhea and screaming.
**Clinical Pearl / High-Yield Fact**
The clinical presentation of intussusception in a neonate is often referred to as the "3 Ds": diarrhea, distension, and discoloration of the stool, which is a classic clinical correlation that examiners often test.
**Correct Answer:** C. Intussusception