Extended Data Fig. 3: Representative example of a sarcoma expressing IgG at the surface of tumor cells.

Representative example of a sarcoma expressing IgG at the surface of tumor cells. A Undifferentiated spindle cell sarcoma of high grade of malignancy (hematoxylin eosin saffron staining) that B showed strong expression of IgG on immunofluorescence. There was a hybrid membranous and cytoplasmic pattern of staining (IgG staining in orange, DAPI counterstaining of nuclei). Twenty total cases were stained.