January 23 International BPDCN Day International BPDCN Day January 23 International BPDCN Day January 23rd of 2025 marks the International BPDCN Day. We unite to shed light on Blastic Plasmacytoid Dendritic Cell Neoplasm (BPDCN), a rare and aggressive hematologic malignancy that often remains underdiagnosed due to its rarity