• Hypercellular marrow
• 100% small high nuclear/cytoplasmic ratio blasts, with indistinct nucleoli, & fine chromatin (see pictures below)
• Periodic acid-Schiff stain (PAS) - Blocky (explain PAS pattern)
• Sudan black B (SBB) -  Negative (explain SSB significance)
• Nonspecific esterase (NSE) - Negative (explain NSE significance)

Peripheral blood	Peripheral blood	Bone Marrow

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