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  Indian J Med Microbiol
 

Figure 1: (a) Microscopic image showing malignant small cell tumor with closely packed uniform round blue cells with inconspicuous nucleoli and scant cytoplasm (hematoxylin and eosin 200×); (b) strong diffuse membranous expression for CD99 (400×); (c) diffuse nuclear immunoexpression for NKX2.2 (200×); and (d) FISH image showing positive analysis for EWSR1 gene rearrangement with one fused signal (yellow), one red and one green signal (arrow)

Figure 1: (a) Microscopic image showing malignant small cell tumor with closely packed uniform round blue cells with inconspicuous nucleoli and scant cytoplasm (hematoxylin and eosin 200×); (b) strong diffuse membranous expression for CD99 (400×); (c) diffuse nuclear immunoexpression for NKX2.2 (200×); and (d) FISH image showing positive analysis for EWSR1 gene rearrangement with one fused signal (yellow), one red and one green signal (arrow)