PMC4430131_01
Low power view exhibiting spindle cell proliferation (arrow) and scattered in between thick-walled blood vessels (arrowhead).
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The prostatic urethral polyp showed a well circumscribed nodule exhibiting scattered thick walled blood vessels that were surrounded by spindle cell proliferation (Fig. 1).
(A) High power showing neoplastic spindle cells (arrow) with elongated bland nuclei and abundant eosinophilic cytoplasm. (B) Actin strongly positive in the spindle cell proliferation (arrow) and walls of blood vessels (arrowhead).
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The cells were elongated, had eosinophilic cytoplasm, bland appearing nuclei, and lacked any cytologic atypia or increased mitotic activity (Fig. 2A). The spindle cell proliferation and the smooth muscle walls of the blood vessels were strongly positive for Actin (Fig. 2B).