A Rare Case of Blastic Plasmacytoid Dendritic Cell Neoplasm Occurred in Postchemotherapy of Breast Cancer

Figure 3

The lymph node architecture is completely effaced by a proliferation of the neoplastic cells ((a) x100), which are medium-sized, with fine chromatin, scanty cytoplasm, and indistinct nucleoli ((b) x400). The tumor cells show immunoreactivity for CD4 (c), CD43 (d), CD56 (e), CD123 (f), and TdT (g), while they are negative for MPO (h). The Ki-67 proliferation index is markedly elevated (50–60%) (i).

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