Fig. 5From: Laparoscopic distal pancreatectomy for metastatic melanoma originating from the choroidal membrane: a case reportSurgically resected specimen of a pancreatic mass. Original magnification × 100. a Hematoxylin and eosin staining, b S100 protein, c HMB-45, d Melan A. Spindle cell appearance with melanin pigment production showed diffuse proliferation. a Immunohistochemical experiments showed positive signals for S100 protein (b), HNB-45 (c), and Melan A (d)Back to article page