Van Assche et al reported a score for perianal Crohn's disease based on MRI findings. This can be used to describe and monitor the disesae severity. The authors are from University of Leuven in Belgium.
Patient selection: perianal Crohn's disease
Parameters:
(1) number of fistula tracks
(2) location relative to the anal sphincter
(3) extension
(4) hyperintensity on T2-weighted images
(5) collections (cavities > 3 mm in diameter)
(6) rectal wall
Parameter
Finding
Points
number of fistula tracks
none
0
single, unbranched
1
single, branched
2
multiple
3
location
extra- or interspincteric
1
transsphincteric
2
supraspincteric
3
extension
infralevatoric
1
supralevatoric
2
hyperintensity T2 weighted
none
0
mild
4
pronounced
8
collections
none
0
any
4
rectal wall
no involvement
0
thickened
2
total score =
= SUM(points for all 6 parameters)
Interpretation:
• minimum score: 2
• maximum score: 22
• The higher the score the more severe the perianal disease.
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