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  Indian J Med Microbiol
 

Figure 2: (a and c) Light microscopy showed the presence of bits of fibrocollagenous tissue infiltrated by small round cells with scanty cytoplasm and hyperchromatic nuclei. At places the cells were arranged in rosettoid manner. Mitotic activity was not well made out. (b) Tumor cells showing immunopositivity to keratin (IHC, ×100). (d) 50% of tumor cells showing nuclear positivity to Ki-67 (IHC, ×100)

Figure 2: (a and c) Light microscopy showed the presence of bits of fibrocollagenous tissue infiltrated by small round cells with scanty cytoplasm and hyperchromatic nuclei. At places the cells were arranged in rosettoid manner. Mitotic activity was not well made out. (b) Tumor cells showing immunopositivity to keratin (IHC, ×100). (d) 50% of tumor cells showing nuclear positivity to Ki-67 (IHC, ×100)