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  Indian J Med Microbiol
 

Figure 1: (A) Lower dermis showing primitive neuroectodermal tumor/Ewing sarcoma composed of small round blue cells (H and E, ×20). (B) Well-circumscribed primitive neuroectodermal tumor/Ewing sarcoma in the subcutaneous tissue (H and E, ×20). (C) Primitive neuroectodermal tumor/Ewing sarcoma with vague pseudorosette pattern (H and E, ×100). (D) Primitive neuroectodermal tumor/Ewing sarcoma cells showing round nuclei with fine chromatin, scant eosinophilic cytoplasm, and mitosis (H and E, ×400). (E) Primitive neuroectodermal tumor/Ewing sarcoma cells with intracytoplasmic glycogen (periodic acid–Schiff, ×400). (F) Loss of intracytoplasmic glycogen after predigestion with diastase (periodic acid–Schiff diastase, ×400)

Figure 1: (A) Lower dermis showing primitive neuroectodermal tumor/Ewing sarcoma composed of small round blue cells (H and E, ×20). (B) Well-circumscribed primitive neuroectodermal tumor/Ewing sarcoma in the subcutaneous tissue (H and E, ×20). (C) Primitive neuroectodermal tumor/Ewing sarcoma with vague pseudorosette pattern (H and E, ×100). (D) Primitive neuroectodermal tumor/Ewing sarcoma cells showing round nuclei with fine chromatin, scant eosinophilic cytoplasm, and mitosis (H and E, ×400). (E) Primitive neuroectodermal tumor/Ewing sarcoma cells with intracytoplasmic glycogen (periodic acid–Schiff, ×400). (F) Loss of intracytoplasmic glycogen after predigestion with diastase (periodic acid–Schiff diastase, ×400)