Figure 2.
Microscopic findings and immunohistochemical analysis results. A: Photomicrograph showing abundant spindle cells and collagen with infiltrating lymphocytes and plasma cells (hematoxylin-eosin staining; magnification, ×200); B-D: Immunohistochemically, the tumor cells were positive for (B) vimentin, (C) Ki-67, and (D) CK (magnification, ×200).