Intestinal immunoglobulin A (IgA) + plasma cells are derived from conventional B2 cells located in the Peyer's patches or isolated lymphoid follicles of the gut, and from B1 cells, which reside in the ...
Eosinophils are commonly detected in normal mucosal biopsies from all sites within the gastrointestinal tract where they are dispersed in the lamina propria and, to a lesser extent, in the epithelium.
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