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(A) Malignant melanoma with radial growth phase next to the infiltrating tumour (hematoxylin-eosin, ×200). (B) Some tumor areas showing spindle-cell morphology (hematoxylin-eosin, ×100). (C) Some areas showing epithelioid morphology, nuclear atypia, and mitotic activity (hematoxylin-eosin, ×200). (D) The neoplastic cells were positive for Melan-A (immunohistochemistry, ×200).
