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Related Experiment Videos

Mesenteric vascular anatomy at CT: normal and abnormal appearances.

J M Zerin1, M A DiPietro

  • 1Department of Radiology, University of Michigan Hospitals, Ann Arbor 48109-0252.

Radiology
|June 1, 1991
PubMed
Summary

Mesenteric vessel inversion on CT scans is not always indicative of malrotation. While it warrants further evaluation, other conditions like abdominal masses can also cause these variations.

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Area of Science:

  • Radiology
  • Gastroenterology
  • Anatomy

Background:

  • The anatomical relationship of mesenteric vessels is crucial for diagnosing gastrointestinal conditions.
  • Variations in the superior mesenteric artery (SMA) and superior mesenteric vein (SMV) can be challenging to interpret.

Purpose of the Study:

  • To evaluate the appearance of mesenteric vessels on computed tomographic (CT) scans.
  • To determine variations in SMA-SMV relationships in normal patients, those with malrotation, and those with abdominal masses.

Main Methods:

  • Retrospective analysis of CT scans from 187 patients.
  • Categorization based on patient condition: normal, malrotation, or abdominal mass.
  • Detailed assessment of SMA and SMV spatial configurations.

Main Results:

  • In 88.8% of patients, the cranial SMV was anterior and to the right of the SMA; other normal configurations existed.
  • Complete SMA-SMV inversion occurred in 8 patients: 1 normal, 2 malrotation, 6 neoplasms (1 with malrotation).
  • Partial mesenteric vessel inversion was observed in 8 patients, none with malrotation.

Conclusions:

  • Mesenteric vessel inversion on CT scans necessitates careful evaluation for malrotation.
  • Mesenteric inversion is not pathognomonic for malrotation and can be associated with abdominal masses or neoplasms.

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