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Figure 4: Calretinin immunocytochemical stain from case #2. Diffusely and strongly stained all epithelioid cells in the cell block, confirming mesothelial derivation. (Peroxidase stain, 600x magnification)

Figure 4: Calretinin immunocytochemical stain from case #2. Diffusely and strongly stained all epithelioid cells in the cell block, confirming mesothelial derivation. (Peroxidase stain, 600x magnification)