Fig. 2
a Hematoxylin and eosin stain (original magnification 40×) of biopsy specimen showing granulation tissue (vessels observed to the left, black arrows) with inflammation composed of mostly macrophages with few neutrophils (circled). The macrophages have abundant cytoplasm with blue staining material inside them. Also present intermingled with the inflammatory infiltrate are areas of necrosis. b Acid-fast bacilli stain (original magnification 400×) showing abundant bacilli (all red stained material) inside macrophages