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Histological images showing (a) a moderately cellular tumor exhibiting ovoidal and spindle cells arranged in small fascicles and embedded in a collagenous stroma (Hematoxylin eosin). (b) Malignant cells did not show neither signs of cytologic atypia nor necrosis and present a low mitotic count (Hematoxylin eosin). (c) Immunohistochemistry shows strong and diffuse positivity for CD34, a pattern consistent with the diagnosis of solitary fibrous tumors.
