Cellular angiofibroma arising from the rectocutaneous fistula in an adult: A case report

Figure 3 Pathological findings. A: Grossly, the excised tumors were gray and elastic; B: Cellular angiofibroma displayed numerous thick-walled blood vessels with wall hyalinization (hematoxylin and eosin [H&E] 40 ×); C: The stroma contained small uniform short spindle-shaped cells with fusiform nuclei and pale indistinct cytoplasm (H&E 400 ×); D: Immunohistochemistry was positive for smooth muscle actin; E: Immunohistochemistry of the estrogen receptor showed focal positivity; F: Immunohistochemistry of the progesterone receptor showed focal positivity.