Definition

A rare, fast-growing cancer that affects the blood, bone marrow, and skin. It can also affect the lymph nodes, spleen, and central nervous system. Most patients with blastic plasmacytoid dendritic cell neoplasm have red-brown or deep purple skin lesions on one or more areas of the body. Blastic plasmacytoid dendritic cell neoplasm usually occurs in older adults and is difficult to diagnose and treat. Also called BPDCN.