A: Spindle cells are arranged in sheets and short fascicles admixed with plasma cells (hematoxylin and eosin stain, ×400). A: Spindle cells are arranged.

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Presentation transcript:

A: Spindle cells are arranged in sheets and short fascicles admixed with plasma cells (hematoxylin and eosin stain, ×400). A: Spindle cells are arranged in sheets and short fascicles admixed with plasma cells (hematoxylin and eosin stain, ×400). The white arrows show lymphoplasmacytic infiltrate, the black arrow shows spindle tumor cells, and the grey arrow shows a congested blood vessel. B: Immunohistochemistry shows focal smooth muscle antigen positivity in tumor cells (×400). Fouzia Siraj et al. TOJ 2017;17:277-279 Copyright © 2018 by Ochsner Clinic Foundation