Figure 2: Hematoxylin and eosin staining showing a narrow grenz zone with nodular aggregates of foamy histiocytes (×20) (a). Collection of epithelioid cells and foamy histiocytes (×40) (b). Ziehl–Neelsen stain showing stacks of slender acid-fast bacilli within these epithelioid cells (oil immersion) (c)
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