Assessment of Disease Activity in Small Bowel Crohn’s Disease:Comparison between Endoscopy and Magnetic Resonance EnterographyUsing MRIA and Modified MRIA Score

Abstract EN

Objectives.

To retrospectively compare the results of the MRIA (magnetic resonance index of activity) with a modified MRIA (mMRIA), which was calculated excluding from MRIA formula the data of relative contrast enhancement (RCE).

Materials and Methods.

MR-E and corresponding endoscopic records of 100 patients were reviewed.

MRIA, mMRIA, and SES endoscopic index were calculated for all the patients.

Namely, MRIA was calculated as follows: (1.5 × wall thickening + 0.02 × RCE + 5 × intramural edema + 10 × ulcers), while mMRIA was calculated with the modified formula (1.5 × wall thickening + 5 × intramural edema + 10 × ulcers).

Results.

Mean MRIA and mMRIA values were 19.3 and 17.68, respectively p<0.0001.

A significant correlation p<0.0001 was observed between MRIA and mMRIA scores and between both MR indexes and SES p<0.0001.

Conclusions.

mMRIA was comparable to MRIA in the evaluation of disease activity in Crohn’s disease.