Similarities and differences between Behçet's disease and Crohn's disease

Table 3 Distribution of similarities and differences in the differential diagnosis of Behçet’s disease and Crohn’s disease^{[2,3,6,8,9,14,58,60,62,68,81]}

	Behçet’s Disease	Crohn’s Disease
Gender (M/F)	4.9-0.57	2.9-0.76
Symptoms onset age (yr)	20.8-40	15-29
Average age at diagnosis (yr)	24.7-35.7	29.5-31
Oral aphtous ulcers (%)	Approximately 100	< 10
Uveitis (%)	57-69	< 10
Skin lesions (%)	61-87	< 10
Arthritis (%)	30-57	2-24.7
Gastrointestinal involvement (%)
Ileocecal area	50-94	40-83
Colon	10-15	32-50
Upper GI	1-3	4
Perianal	1-2	10-15
Intestinal complications (%)
Perforation	12.7	8.7
Fistula	7.6	24.7
Stricture	7.2	38.3
Abscess	3.3	19.6
Endoscopic Morphology	Round-oval shape,	Longitudinal ulcers with a cobblestone appearance
	Focal, solitary	(segmental and diffuse distribution)
	Volcano-shaped
	Deep ulcers
Mucosal Biopsy	Vasculitis	Granuloma
	Neutrophilic infiltration	Focal cryptitis
	Fibrinopurulent exudates	Nerve fiberhyperplasia
	Necrotic debris	Lymphoid aggregates