A 6 months old baby with H/0 bloody diarrhoea of 2 days duration with abdominal distension and on examination the baby screams, diagnosis is –
**Core Concept**
Intussusception is a medical emergency in infants characterized by the telescoping of a segment of the intestine into an adjacent segment, leading to bowel obstruction and potentially life-threatening complications. This condition often presents with abdominal pain, vomiting, and bloody stools due to mucosal ischemia and rupture.
**Why the Correct Answer is Right**
The diagnosis of intussusception is primarily clinical, supported by imaging studies such as ultrasound. In this case, the presence of abdominal distension, bloody diarrhea, and the infant's screaming upon examination are classic signs of intussusception. The condition typically occurs in infants between 6 and 12 months of age, with the peak incidence around 4-9 months. The exact cause of intussusception is often unknown, but lead points such as a Meckel's diverticulum, pyloric stenosis, or a viral infection may contribute to the development of the condition.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is likely referring to a viral gastroenteritis, such as rotavirus or norovirus, which can cause diarrhea and vomiting in infants but does not typically present with abdominal distension and bloody stools.
**Option B:** This option may refer to a condition such as necrotizing enterocolitis (NEC), which is a more severe condition that primarily affects premature infants. While NEC can cause abdominal distension and bloody stools, the clinical presentation and risk factors differ from intussusception.
**Option C:** This option might suggest a diagnosis of volvulus, a condition where a portion of the intestine twists around its mesenteric blood supply. While volvulus can cause intestinal obstruction and potentially lead to ischemia, the clinical presentation typically includes more severe abdominal pain and potentially life-threatening complications.
**Clinical Pearl / High-Yield Fact**
The "Owl's eye" sign on ultrasound is a characteristic finding in intussusception, representing the intussuscepted bowel segment surrounded by a hypoechoic rim of mesenteric fat.
**Correct Answer:** C.