Paraganglioma-like Dermal Melanocytic Tumor David Cassarino, MD, PhD Cyril Fisher, MD, DSc, FRCPath Key Facts Terminology Paraganglioma-like dermal melanocytic tumor (PLDMT) Rare dermal-based, low-grade melanocytic tumor with histologic similarities to…
Dermal Melanocytoses (Nevus of Ota and Ito, Mongolian Spot) Christine J. Ko, MD Key Facts Clinical Issues Nevus of Ota and Ito and Mongolian spot Often evident at birth Occasionally…
Combined Nevi Christine J. Ko, MD Key Facts Terminology Presence of 2 or more distinct populations of melanocytes or Presence of 2 or more types of melanocytic nevi Clinical Issues…
Cellular Blue Nevi Soheil Sam Dadras, MD, PhD Olubukola Babalola Key Facts Terminology Cellular variant of blue nevus Clinical Issues Occurs in children and young adults Heavily pigmented black/blue nodule…
Blastic Plasmacytoid Dendritic Cell Neoplasm Aaron Auerbach, MD, PhD Key Facts Terminology Tumor of plasmacytoid dendritic cells, often involves the skin and bone marrow, and disseminates to blood Clinical Issues…
Cutaneous and Systemic Mastocytosis Jeremy C. Wallentine, MD Key Facts Terminology Heterogeneous group of clonal neoplastic proliferations of mast cells in ≥ 1 organ system Cutaneous mastocytosis: Confined to skin…
Cutaneous Gamma-Delta T-cell Lymphoma Aaron Auerbach, MD, PhD Key Facts Terminology T-cell lymphoma of mature γδ cells Separately classified from SPTCL in WHO (2008) Clinical Issues Hemophagocytic syndrome in 45%…
Subcutaneous Panniculitis-like T-cell Lymphoma Aaron Auerbach, MD, PhD Key Facts Terminology T-cell lymphoma of αβ cells usually involving subcutaneous tissue with prominent karyorrhexis and cytotoxic phenotype Cases composed of γδ…
Systemic T-cell and NK-cell Lymphomas Involving the Skin Aaron Auerbach, MD, PhD Key Facts Terminology Systemic T-cell or NK-cell lymphoma that has spread to the skin Morphology of primary and…
