This issue of Hematology/Oncology Clinics, guest edited by Andrew A. Lane, will cover Blastic Plasmacytoid Dendritic Cell Neoplasm. This issue is one of six selected each year by our series consulting editors, Dr. George P. Canellos and Dr. Edward J. Benz. Topics discussed in this issue include: Clinical Presentation and Pathology, Molecular Features of Blastic Plasmacytoid Dendritic Cell Neoplasm: DNA mutations and epigenetics, Cytogenetics of Blastic Plasmacytoid Dendritic Cell Neoplasm, Blastic Plasmacytoid Dendritic Cell Neoplasm Chemotherapy, CD123 and Leukemia Stem Cells, Tagraxofusp for Blastic Plasmacytoid Dendritic Cell Neoplasm, Immune Therapies Targeting CD123 in Blastic Plasmacytoid Dendritic Cell Neoplasm, Novel Therapies for Blastic Plasmacytoid Dendritic Cell Neoplasm, Blastic Plasmacytoid Dendritic Cell Neoplasm in Children, European Perspective, Stem Cell Transplantation for Blastic Plasmacytoid Dendritic Cell Neoplasm, and Social Media in Blastic Plasmacytoid Dendritic Cell Neoplasm and Other Rare Diseases.