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. 2018 Sep 9;12:253. doi: 10.1186/s13256-018-1796-7

Fig. 2.

Fig. 2

a Histological examination (hematoxylin-eosin staining) shows spindle cell proliferation with infiltration of lymphocytes and plasma cells. b Immunohistochemically, neoplastic cells are focally positive for smooth muscle actin