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Difficulty: MediumInterpreting Imaging Results

Match each distinctive pediatric gastrointestinal imaging description to its corresponding pathognomonic clinical diagnosis.

  • Abdominal radiograph showing two prominent air-filled cystic structures in the upper abdomen with a complete absence of distal bowel gas.Duodenal atresia
  • Upper gastrointestinal contrast series demonstrating the duodenojejunal junction remaining on the right side of the spine with a spiral appearance of the distal bowel.Midgut volvulus
  • Abdominal ultrasonography revealing a multi-layered appearance of alternating echogenic and hypoechoic concentric rings in the right upper quadrant.Intussusception
  • Abdominal radiograph demonstrating linear, curvilinear, or bubbly radiolucencies tracking within the bowel wall of a premature neonate.Necrotizing enterocolitis
  • Contrast enema showing a narrow-caliber distal rectosigmoid colon expanding abruptly into a dilated proximal colon with a distinct transition zone.Hirschsprung disease

Answer

The correct matches are: Two cystic structures/no distal gas matches Duodenal atresia. Spiral appearance on upper GI series matches Midgut volvulus. Concentric rings on ultrasound matches Intussusception. Bowel wall radiolucencies matches Necrotizing enterocolitis. Contrast enema transition zone matches Hirschsprung disease.
Each imaging description uniquely characterizes a specific pediatric gastrointestinal emergency. Accurate pattern recognition of these classic radiographic, fluoroscopic, and ultrasonographic signs allows clinicians to avoid unnecessary test sequencing and proceed immediately to surgical or medical intervention.

Step-by-Step Solution

1
Analyze the first imaging finding: 'two prominent air-filled cystic structures' with no distal gas.
Identify this as the 'double bubble' sign.
This sign indicates a complete obstruction at the level of the duodenum, diagnostic of duodenal atresia.
2
Evaluate the second finding: 'duodenojejunal junction on the right' with a 'spiral appearance'.
Identify this as the 'corkscrew' sign on upper GI series.
This represents the bowel twisting around its mesenteric axis, defining midgut volvulus.
3
Assess the third finding: 'alternating echogenic and hypoechoic concentric rings' on ultrasound.
Identify this as the 'target sign'.
This ultrasonographic pattern confirms bowel telescoping into itself, which is the mechanism of intussusception.
4
Review the fourth finding: 'radiolucencies tracking within the bowel wall'.
Identify this as pneumatosis intestinalis.
Intramural gas in a premature neonate is the primary radiographic criterion for diagnosing necrotizing enterocolitis.
5
Examine the fifth finding: 'narrow-caliber distal colon expanding abruptly' with a 'transition zone'.
Link the transition zone on contrast enema to its pathophysiologic cause.
The failure of neural crest cell migration leaves the distal colon aganglionic and contracted, leading to proximal dilation, typical of Hirschsprung disease.

Key Concept

Identifying pathognomonic imaging signs is critical for establishing a rapid and accurate diagnosis in pediatric gastrointestinal emergencies.
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Interpreting Imaging Results

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