Case-Control Study of 3D Morphology in Isolated Mesenteric Artery Dissection

Area of Science:

• Vascular Surgery
• Medical Imaging
• 3D Volumetric Analysis

Background:

• Isolated Mesenteric Artery Dissection (IMAD) is a rare condition with limited detailed investigation.
• Understanding the specific morphological characteristics of IMAD is crucial for diagnosis and treatment.

Purpose of the Study:

• To identify and quantify the morphological differences between patients with IMAD and control individuals.
• To utilize detailed 3D volumetric analysis for precise characterization of IMAD.

Main Methods:

• A retrospective case-control study involving 17 IMAD patients and 51 matched controls.
• Semi-automatic 3D morphological analysis of the mesenteric artery, including lumen volumes, cross-sectional areas, diameters, centerline curvature, and 3D aortomesenteric angles.
• Case-control matching was performed based on age, gender, and body mass index (BMI).

Main Results:

• IMAD patients exhibited a significantly larger overall lumen (OL) volume (+64%), cross-sectional area (+77%), and diameter (+34%) compared to controls.
• No significant difference in true lumen (TL) volume or cross-sectional area was observed, but TL diameter was smaller in IMAD patients.
• IMAD patients with acute mesenteric ischemia showed a lower TL/OL volume ratio (45% vs. 59%) and longer dissections.
• A significantly higher 3D aortomesenteric angle was found in IMAD patients at 2 cm and 4 cm from the ostium.

Conclusions:

• 3D semi-automated analysis reveals significant morphological alterations in IMAD, including increased overall lumen volume/area and a larger 3D aortomesenteric angle.
• The findings highlight distinct anatomical differences between IMAD patients and healthy individuals.
• A more severe morphological profile was associated with IMAD patients experiencing acute mesenteric ischemia.