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a Microscopically, hematoxylin, and eosin staining of the tumor showed no viable tumor cells in any surgical specimen. Extensive fibrosis with chronic inflammation, hemosiderin deposition, and bleeding were observed at the site where FDG accumulation was originally observed (magnification × 1.25). b The infiltration of atypical multinucleated giant cells (arrow) was also observed (magnification × 40)
