Magnetic resonance imaging may predict deep remission in patients with perianal fistulizing Crohn's disease

Table 1 Patients’ characteristics n (%)

	Patients (n = 49)
Age yr (mean; extreme)	33; 14-70
Sex ratio (men/women)	0.58
Familial history of IBD	4 (8.2)
Smoking	21 (42.9)
Mean duration of CD (mo)	72 (0-300)
Location
L1 ileal	4 (8.2)
L2 colonic	15 (30.6)
L3 ileocolonic	22 (44.9)
L2 or L3 + L4 upper disease	8 (16.3)
Disease behavior
Inflammatory	34 (69.4)
Structuring	8 (16.3)
Penetrating	7 (14.3)
Extraintestinal manifestations	11 (22.4)
Ileocolonic resection	11 (22.4)
Previous perianal surgery	40 (81.6)
CRP (mg/L)	11.5 (1.6-167)
Albumin rate (g/L)	35.2 (20-49.2)

IBD: Inflammatory bowel disease; CD: Crohn’s disease; L: Location; CRP: C-reactive protein.

Table 2 Baseline magnetic resonance imaging evaluation n (%)

	Patients (n = 49)
Van Assche score (mean)	13
Ramified fistula	13 (26.5)
Multiple fistula	10 (20.4)
Inter/extrasphincteric fistula	31 (63.3)
Transsphincteric fistula	15 (30.6)
Suprasphincteric fistula	3 (6.1)
Infralevatoric extension	43 (87.8)
Supralevatoric extension	6 (12.2)
Abscess	19 (38.8)
Rectal involvement	21 (42.9)
T2 hyperintensity
Absent	3 (6.1)
Mild	11 (22.4)
Pronounced	35 (71.4)
Enhancement	49 (100)
Anorecto-vaginal fistula	7 (14.3)