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Figure 4: (a) Tumor composed of islands of large polyhedral epithelial cells in a fibrous stroma (H and E, ×4). (b and c) stroma of tumor shows extracellular amyloid-like material. (d) Congo red stain does not demonstrate amyloid

Figure 4: (a) Tumor composed of islands of large polyhedral epithelial cells in a fibrous stroma (H and E, ×4). (b and c) stroma of tumor shows extracellular amyloid-like material. (d) Congo red stain does not demonstrate amyloid