Amelanotic Melanoma Masquerading as a Granular Cell Lesion
Figure 4
(a) Immunohistochemistry for pan cytokeratin showing no expression in tumour cells (5x). (b) Immunohistochemistry for desmin showing diffuse positivity (10x). (c) Immunohistochemistry for vimentin (diffusively positive (10x)). (d) Immunohistochemistry for S100 showing diffuse nuclear and cytoplasmic expression (40x). (e) Immunohistochemistry for CD 68 (negative, (10x)). (f) Immunohistochemistry for neuron-specific enolase (negative, (10x)). (g) Immunohistochemistry for myoglobin (negative, (5x)). (h) Immunohistochemistry showing positivity for HMB-45 (40x). (i) Immunohistochemistry for Melan-A; granular localization is observed in the cytoplasm (40x).
