A Case of Concurrent Riedel’s, Hashimoto’s and Acute Suppurative Thyroiditis

Figure 2

(a) “Subocclusive vasculitis” with inflammatory infiltrate in the thickened vessel wall. Note the keloid-like fibrosis around the vessel (hematoxylin and eosin, original magnification $\times$20). (b) Fibrosis extending into the perithyroidal skeletal muscle (hematoxylin and eosin, original magnification $\times$10). (c) Small follicles with scant colloid and small islands of oncocytic epithelium surrounded by an intense lymphoid infiltrate with germinal centers (hematoxylin and eosin, original magnification $\times$40). (d) Microabscess in a dense fibrous background (hematoxylin and eosin, original magnification $\times$40).

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