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Difficulty: MediumInterpreting Imaging Results

Match the following classic gastrointestinal imaging findings with their most likely underlying diagnosis.

  • Mucosal and submucosal edema causing thick, nodular indentations along the colonic wall on abdominal radiographIschemic colitis
  • Alternating concentric hyperechoic and hypoechoic rings in the right lower quadrant on abdominal ultrasonographyIntussusception
  • Swirling appearance of the mesentery and superior mesenteric vein around the superior mesenteric artery axis on contrast-enhanced CTMidgut volvulus
  • Dilated proximal esophagus with smooth, symmetric tapering at the gastroesophageal junction on fluoroscopyAchalasia
  • Short segment of focal colonic narrowing with irregular, overhanging mucosal margins on contrast enemaColorectal adenocarcinoma

Answer

Mucosal edema ('thumbprinting') pairs with Ischemic colitis; Concentric rings ('target sign') pairs with Intussusception; Swirling mesentery ('whirlpool sign') pairs with Midgut volvulus; Smooth esophageal tapering ('bird-beak sign') pairs with Achalasia; Irregular colonic narrowing ('apple core lesion') pairs with Colorectal adenocarcinoma.
Each specific morphological alteration on imaging correlates directly with the underlying pathophysiology: localized ischemia causes submucosal edema (thumbprinting), telescoping bowel creates concentric layers (target sign), mesenteric torsion creates a vascular vortex (whirlpool sign), denervation prevents sphincter relaxation (bird-beak sign), and malignant infiltration creates irregular strictures (apple core lesion).

Step-by-Step Solution

1
Analyze the description of nodular colonic indentations.
Identified as 'thumbprinting', which indicates bowel wall swelling.
This is a classic radiographic sign of bowel wall edema and submucosal hemorrhage secondary to ischemic colitis.
2
Interpret the ultrasound finding of concentric rings in the right lower quadrant.
Identified as the 'target sign'.
This cross-sectional appearance occurs when one segment of bowel telescopes into another, diagnostic of intussusception.
3
Evaluate the CT description of twisting mesenteric vessels.
Identified as the 'whirlpool sign'.
This rotational anomaly creates a swirling pattern of the superior mesenteric vein around the artery, confirming midgut volvulus.
4
Assess the fluoroscopic finding of symmetric esophageal tapering.
Identified as the 'bird-beak sign'.
The loss of inhibitory ganglion cells in achalasia leads to a failure of the lower esophageal sphincter to relax, creating this distinct smooth taper.
5
Correlate the contrast enema finding of irregular mucosal narrowing.
Identified as the 'apple core lesion'.
Malignant tumors grow circumferentially and cause irregular, asymmetric strictures with overhanging mucosal edges, typical of adenocarcinoma.

Key Concept

Recognizing pathognomonic radiological signs based on their anatomical and pathophysiological descriptions is essential for establishing an accurate clinical diagnosis in gastrointestinal disorders.
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Interpreting Imaging Results

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