A, Low-power view of biopsy showing pseudoepitheliomatous hyperplasia with downgrowth of rete ridges and hyperplastic follicular structures surrounded by mixed inflammation (Hematoxylin-eosin stain; original magnification: 340). B, Medium-power view of mixed inflammatory cells around the hyperplastic squamous nests (Hematoxylineosin stain, original magnification: 3100). C, High-power view showing ill-defined granuloma composed of predominantly histiocytes and scattered lymphocytes (Hematoxylin-eosin stain, original magnification: 3200). D, Ziehl-Neelsen stain with negative result for acid fast bacilli (ZN, original magnification: 3400).

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Context 1

... polymerase chain reaction test for NTM was positive, and DNA sequencing revealed M mageritense. In both cases, pathologic evaluations revealed pseudoepitheliomatous hyperplasia with granulomatous inflammation, compatible with an infectious process or foreign-body reaction (Fig 3). Ziehl-Neelsen staining of the histologic samples were negative for acid-fast bacilli. ...