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(A) The prominent acellular myxoid stroma is positive for Alcian blue at pH 2.5. Histochemistry; original magnification, ×100. (B) The tumour cells display strong immunoreactivity with desmin. Immunohistochemistry; original magnification, ×100. (C) The tumour displays expansive growth margins and does not infiltrate the underlying bone of the nasal septum. Haematoxylin and eosin stained; original magnification, ×40.
