Confocal endomicroscopy in patients with ulcerative colitis

Area of Science:

• Gastroenterology
• Medical Imaging
• Cellular Biology

Background:

• Confocal endomicroscopy offers in vivo microscopic imaging of gastrointestinal cellular morphology.
• Confocal microendoscopy enables real-time histological diagnosis during endoscopic procedures.

Purpose of the Study:

• To investigate the features of confocal endomicroscopic images of inflamed and non-inflamed rectal mucosa in patients with ulcerative colitis (UC).

Main Methods:

• Seventeen UC patients (12 active, 5 non-active) and 14 controls underwent colonoscopy with confocal endomicroscopy of rectal mucosa.
• Fluorescence images were captured and compared with histological findings from rectal biopsy specimens.

Main Results:

• Confocal microendoscopy visualized cellular and subcellular structures, including crypts, lumens, inflammatory cells, and capillaries.
• Normal mucosa showed small, regular crypts. Non-active UC had slightly irregular crypts. Active UC displayed large, irregular crypts with obscured structures.
• Increased inflammatory cells and capillaries were observed in the lamina propria of UC patients, particularly in the active phase.

Conclusions:

• Confocal microendoscope images provided histology-equivalent information for rectal tissues.
• The technology enhances understanding of differences in crypts, capillaries, and inflammatory cells between normal controls and UC patients.
• Confocal endomicroscopy aids in differentiating active and non-active ulcerative colitis during endoscopy.