Blastic plasmacytoid dendritic cell neoplasm in a young patient.

Blastic plasmacytoid dendritic cell neoplasm is a rare hematologic neoplasm originating from plasmacytoid dendritic cell precursors that has an aggressive disease course with typically poor prognosis. Herein, we report a man in his early twenties who presented with rapid onset of violaceous nodules and purpuric papules and macules that began on his chest before spreading to his arms, back, face, scalp, and legs. He also exhibited systemic symptoms including weight loss and night sweats. He was diagnosed with blastic plasmacytoid dendritic cell neoplasm and began treatment with aggressive multidrug therapy. Thus far his treatment has resulted in complete resolution of his cutaneous manifestations.