Role of mucosal dendritic cells in inflammatory bowel disease

Table 1 Anatomic compartments of GALT

Compartment			Gut segment
Inductive/effector sites	Structure	Abbreviation	Small intestine		Large intestine3
			Upper1	Lower2
Effector	Lamina propria	LP	+++	+++	+++
	Intraepithelial lymphocytes	IEL	+++	+++	+++
Inductive	Peyer’s patch	PP	+	+++	-
	Intestinal lymph follicle	iLF	+	+++	-
	Intestinal lymph aggregate	iLA	+	++	++
	Mesenteric lymph node	MLN	-	-	-

¹Distribution of the described structures in the upper small intestine (duodenum and jejunum);

²Distribution of the described structures in the upper small intestine (ileum);

³Distribution of the described structures in the upper small intestine (ileum). “+++”: Very frequent; “++”: Frequent; “+”: Randomly; “-“: Not present.