Figure 2.

(a) A biopsy specimen obtained from the right B8a and subjected to histopathological analysis shows noncaseating epithelioid granulomas (arrows, ×100). (b) A granuloma specimen under ×400 magnification. (c) Magnified pictures (×400) of a rectangle within the left upper panel are shown. Alcian blue positive intraluminal fibrosis with mural incorporation is observed (left lower panel).
EMG, elastica masson-goldner; H&E, hematoxylin and eosin staining.