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  Indian J Med Microbiol
 

Figure 4: Aspirate from the nodule was moderately cellular showing cells arranged in vascularized fragments (May–Grünwald–Giemsa stain, ×100) and as microfollicles (inset; May–Grünwald–Giemsa stain, ×400). (a) Sections from the resection specimen showed the features of parathyromatosis. Cellular parathyroid tissue was interspersed as islands within fibro-adipose tissue (H and E, ×40). (b) There were areas of hypercellularity (H and E, ×400), but significant atypia or mitotic activity not seen. (c) MIB-1 labeling index was low (1%–2% in highest proliferative area) (IHC, ×600). (d) Vascular emboli were seen (e, H and E, ×400). CD 34 highlighted the endothelial cells (f, IHC, ×200)

Figure 4: Aspirate from the nodule was moderately cellular showing cells arranged in vascularized fragments (May–Grünwald–Giemsa stain, ×100) and as microfollicles (inset; May–Grünwald–Giemsa stain, ×400). (a) Sections from the resection specimen showed the features of parathyromatosis. Cellular parathyroid tissue was interspersed as islands within fibro-adipose tissue (H and E, ×40). (b) There were areas of hypercellularity (H and E, ×400), but significant atypia or mitotic activity not seen. (c) MIB-1 labeling index was low (1%–2% in highest proliferative area) (IHC, ×600). (d) Vascular emboli were seen (e, H and E, ×400). CD 34 highlighted the endothelial cells (f, IHC, ×200)