Complete resection of isolated pancreatic metastatic melanoma: A case report and review of the literature

Figure 1 Computed tomography showing a pseudocystic tumor (arrows) as a benign cyst (A) and a bigger pseudocystic tumor poorly demarcated from the surrounding tissue (B).

Figure 2 Specimen showing a metastatic melanoma as a black-brown mass (arrow) in pancreatic tail.

Figure 3 Microscopy showing epithelioid or polygon tumor cells infiltrating the pancreatic tail (A), dark brown granular intracytoplasmic pigmentation in most tumor cells (B), positive HMB-45 (C) and S-100 protein (D). Original magnification × 200. A and B: HE staining; C and D: Immunostaining.