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(a) Hematoxylin eosin stain of the specimen (2x HPF). (b) Hematoxylin eosin stain of the specimen (10x HPF). (c) Immunohistochemistry showing positivity to a-smooth muscle actin (a-SMA) (2x HPF). (d) Immunohistochemistry showing positivity to a-smooth muscle actin (a-SMA) (10x HPF). ((e) and (f)) Immunohistochemistry revealing a mitotic index (Ki-67) of 90% positivity (2x HPF and 10x HPF).
