A 42-year old man was referred with a 2 week history of fever weakness and bleeding gum. Peripheral smear showed pancytopenia. The bone marrow examination revealed 26% blasts frequency exhibiting Auer rods and mature myeloid cells. An occasional neutrophil with pseudo Pelger-Huet anomaly was also detected. Which of the following cytochemical stains is most likely to be positive?

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Vikas Bhardwaj
Medical Technologist, AIIMS New Delhi
Updated: Apr 17, 2026