Blastic Plasmacytoid Dendritic Cell Neoplasm: A Case Report and Clinicopathological Review.

Blastic plasmacytoid dendritic cell neoplasm (BPDCN) is aggressive hematopoietic malignancy derived from the precursors of plasmacytoid dendritic cells. The present study reported a case of a 35-year-old BPDCN patient, who presented with scalp lesions without extracutaneous involvement of the lymph nodes (LNs), peripheral or bone marrow. Histopathological examination of scalp lesion revealed monomorphous diffuse infiltrate of small to medium-sized cells with irregular nuclear contours, pleomorphic nuclei, finely dispersed chromatin, inconspicuous nucleoli and scant amount of cytoplasm.