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Difficulty: HardPediatric Gastrointestinal Disorders

Match each of the following definitive histopathologic or mucosal biopsy findings to the corresponding pediatric gastrointestinal disorder it most accurately diagnoses.

  • Absence of parasympathetic ganglion cells in the submucosal and myenteric plexuses with prominent hypertrophied nerve trunksHirschsprung disease
  • Duodenal mucosa demonstrating villous atrophy, crypt hyperplasia, and significantly increased intraepithelial lymphocytesCeliac disease
  • Esophageal squamous epithelium showing greater than 15 eosinophils per high-power field and basal zone hyperplasiaEosinophilic esophagitis
  • Distal ileal outpouching tissue demonstrating the presence of heterotopic gastric oxyntic mucosaMeckel diverticulum
  • Small bowel enterocytes exhibiting prominent clear cytoplasmic lipid vacuoles due to impaired chylomicron assemblyAbetalipoproteinemia

Answer

The accurate pairs are: absent ganglion cells with Hirschsprung disease, duodenal villous atrophy with Celiac disease, >15 eosinophils/hpf with Eosinophilic esophagitis, heterotopic gastric mucosa with Meckel diverticulum, and clear lipid vacuoles with Abetalipoproteinemia.
Each histopathologic description provided represents the definitive diagnostic biopsy finding for a specific pediatric gastrointestinal disorder. Recognizing these pathognomonic cellular and structural changes is essential for confirming clinical suspicion when imaging or serology is insufficient.

Step-by-Step Solution

1
Analyze the histopathologic finding of absent ganglion cells and hypertrophied nerves.
Identified as the pathognomonic finding for Hirschsprung disease.
Neural crest cell migration failure leaves the distal colon aganglionic, requiring a rectal suction biopsy to assess the submucosal (Meissner) plexus.
2
Analyze the finding of villous atrophy and intraepithelial lymphocytosis.
Correlated with Celiac disease.
This represents the classic immune-mediated mucosal damage seen in the duodenum upon gluten exposure.
3
Analyze the presence of >15 eosinophils per high-power field in esophageal tissue.
Matched to Eosinophilic esophagitis.
This is the precise histologic diagnostic criterion for distinguishing this allergic condition from severe gastroesophageal reflux disease.
4
Analyze the finding of heterotopic gastric mucosa in an ileal outpouching.
Identified as Meckel diverticulum.
Failure of the omphalomesenteric duct to obliterate can leave an outpouching that frequently contains ectopic gastric mucosa.
5
Analyze the presence of enterocytes stuffed with clear lipid vacuoles.
Linked to Abetalipoproteinemia.
Deficiency in the microsomal triglyceride transfer protein (MTP) prevents chylomicron formation, trapping lipids within the intestinal epithelium.

Key Concept

Histopathologic diagnosis of pediatric gastrointestinal disorders
Estimated Time:2m 0s
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Topics

Pediatric Gastrointestinal Disorders

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