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Differential diagnosis of blastic plasmacytoid dendritic cell neoplasm
| Benign | Malignant |
|---|---|
| Tuberculosis | Acute myeloid leukemia |
| Toxoplasmosis | Leukemia cutis |
| Sarcoidosis | Myeloid sarcoma |
| Histiocytic necrotizing lymphadenitis | Extranodal NK/T-cell lymphoma, nasal type |
| Castleman disease | Cutaneous T-cell lymphoblastic leukemia/lymphoma |
| Systemic lupus erythematosus | Primary cutaneous T-cell lymphoma |
| Lichen planus | |
| Psoriasis | |
| Contact dermatitis |
Abbreviation: NK, natural killer.
