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Unusual ultrastructural features in microvillous inclusion disease: A report of two cases

Manrico Morroni1, Angela Maria Cangiotti, Alfredo Guarino

  • 1Institute of Normal Human Morphology, Faculty of Medicine, Polytechnic University of Marche, Ancona, Italy. m.morroni@univpm.it

Virchows Archiv : an International Journal of Pathology
|April 13, 2006
PubMed

Insights

Microvillous Inclusion Disease (MID) causes severe infant diarrhea. This study found immature goblet cells in MID patients, a potential diagnostic marker requiring further investigation.

Area of Science:

  • Gastroenterology
  • Cell Biology
  • Pediatric Pathology

Background:

  • Microvillous Inclusion Disease (MID) is a rare inherited enteropathy causing severe diarrhea in infants.
  • Diagnosis relies on identifying characteristic microvillous inclusions within enterocytes via electron microscopy.
  • Understanding cellular changes in MID, including goblet cells, can enhance diagnostic capabilities.

Observation:

  • Duodenal biopsies from two infants with MID were analyzed using light and electron microscopy.
  • MID enterocytes exhibited brush-border abnormalities, microvillous inclusions, dense granules, and lysosomes.
  • Immature goblet cells with microvilli were observed in one MID case, but only mature goblet cells were found in controls.

Findings:

  • Ultrastructural analysis revealed pathognomonic microvillous inclusions in enterocytes of infants with MID.
  • Atrophy of intestinal villi and PAS-positive material in enterocyte cytoplasm were noted.
  • The presence of immature goblet cells in MID mucosa is a novel observation.

Implications:

  • Immature goblet cells may serve as a potential diagnostic indicator for Microvillous Inclusion Disease.
  • Further research is needed to elucidate the functional significance of immature goblet cells in MID.
  • This study contributes to a deeper understanding of the cellular pathology of inherited diarrheal disorders.

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