Plasmacytoid Melanoma of the Urinary Bladder and Lymph Nodes with Immunohistochemical Expression of Plasma Cell Markers Revealing Primary Esophageal Melanoma
Figure 6
(a) Neoplastic cells showed strong positivity with S100 protein (×100). (b) Focal expression for CD138/syndecan-1 (×100). (c) Neoplastic cells showed strong positivity with HMB45 (×40). (d) HMB45 staining showing increased number of melanocytic cells at the basal layer of the squamous epithelium (×100).