Question:
A 6-month-old child presents with severe abdominal pain. Stool examination shows a red “currant jelly” appearance. Which is the best modality to diagnose this condition?
A 6-month-old child presents with severe abdominal pain. Stool examination shows a red “currant jelly” appearance. Which is the best modality to diagnose this condition?
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Intussusception Imaging Gold Standard:
$\bullet$ Transverse USG: Target Doughnut Bull's eye sign
$\bullet$ Longitudinal USG: Pseudokidney Sandwich sign
Initial treatment of choice (if no perforation): Ultrasound-guided Hydrostatic or Air Enema reduction.
$\bullet$ Transverse USG: Target Doughnut Bull's eye sign
$\bullet$ Longitudinal USG: Pseudokidney Sandwich sign
Initial treatment of choice (if no perforation): Ultrasound-guided Hydrostatic or Air Enema reduction.
Updated On: Sep 3, 2026
- Per rectal examination
- Ultrasound abdomen
- MRI
- Abdominal radiograph
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The Correct Option is B
Solution and Explanation
Concept:
The classic clinical triad of acute intussusception consists of intermittent colicky abdominal pain (screaming episodes with legs pulled up to the abdomen), vomiting, and passage of blood and mucus per rectum ("currant jelly" stools).
Establishing a prompt, non-invasive, radiation-free, and definitive anatomical diagnosis is essential to prevent bowel ischemia, necrosis, and perforation.
Explanation:
• Abdominal Ultrasonography is the gold-standard and primary diagnostic imaging modality of choice for pediatric intussusception, boasting a sensitivity and specificity approaching $100\%$ in experienced hands.
• On transverse sonographic cross-sections, it reveals the pathognomonic "target", "doughnut", or "bull's eye" sign, representing concentric alternating hyperechoic and hypoechoic rings of bowel wall edema and invaginated mesenteric fat.
• On longitudinal views, it demonstrates the "pseudokidney" or "sandwich" sign, where layers of the intussusceptum are seen telescoping within the intussuscipiens.
• Abdominal radiographs (X-rays) have low sensitivity and are mainly used to rule out bowel perforation (pneumoperitoneum) prior to reduction.
• MRI is impractical in acute emergencies due to long acquisition times and the requirement for sedation.
• Digital rectal examination may confirm the presence of blood or a palpable "cervix-like" mass (Dance's sign), but it cannot definitively confirm the diagnosis or evaluate bowel viability.
Final Answer:
Abdominal ultrasonography is the most accurate and best imaging modality to diagnose intussusception in children.
The classic clinical triad of acute intussusception consists of intermittent colicky abdominal pain (screaming episodes with legs pulled up to the abdomen), vomiting, and passage of blood and mucus per rectum ("currant jelly" stools).
Establishing a prompt, non-invasive, radiation-free, and definitive anatomical diagnosis is essential to prevent bowel ischemia, necrosis, and perforation.
Explanation:
• Abdominal Ultrasonography is the gold-standard and primary diagnostic imaging modality of choice for pediatric intussusception, boasting a sensitivity and specificity approaching $100\%$ in experienced hands.
• On transverse sonographic cross-sections, it reveals the pathognomonic "target", "doughnut", or "bull's eye" sign, representing concentric alternating hyperechoic and hypoechoic rings of bowel wall edema and invaginated mesenteric fat.
• On longitudinal views, it demonstrates the "pseudokidney" or "sandwich" sign, where layers of the intussusceptum are seen telescoping within the intussuscipiens.
• Abdominal radiographs (X-rays) have low sensitivity and are mainly used to rule out bowel perforation (pneumoperitoneum) prior to reduction.
• MRI is impractical in acute emergencies due to long acquisition times and the requirement for sedation.
• Digital rectal examination may confirm the presence of blood or a palpable "cervix-like" mass (Dance's sign), but it cannot definitively confirm the diagnosis or evaluate bowel viability.
Final Answer:
Abdominal ultrasonography is the most accurate and best imaging modality to diagnose intussusception in children.
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