Blastic plasmacytoid dendritic cell neoplasm: Two case reports

Figure 1 Skin lesions and the images of the hematoxylin-eosin and immunohistochemistry analyses for patient 1. The image above depicts multiple nodules and bruise-like lesions on the chest and back. A: There is an evident acellular infiltration zone between the tumor cells and the epidermis [hematoxylin-eosin (HE) staining, 100 ×]; B: Microscopically, the dermis is diffused with infiltrated medium-sized blast cell (HE staining, 400 ×); C: CD123 positive; D: CD4 positive; E: CD56 positive; F: Approximately 75% of Ki67 were positive; G: CD56 positive; H: Approximately 75% of Ki67 were positive.

Figure 2 Skin lesions and the images from the hematoxylin-eosin and immunohistochemistry analyses for patient 2. The image above depicts a solitary, cystic nodule on the upper arm. A: Grenz zone between the tumor cells and the epidermis [hematoxylin-eosin (HE) staining, 100 ×]; B: Microscopically, blast cells with weak and uneven basophilic cytoplasm and prominent mitotic figures in the dermis (HE staining, 400 ×); C: CD4 positive; D: CD56 positive; E: CD123 positive; F: Approximately 50% of Ki67 were positive; G: Approximately 50% of Ki67 were positive.