We found that B7-H4 was expressed by tumor cells and at low levels on tumor-infiltrating APCs (Fig. 1A; Fig. 2C,D; Fig. 5D,E), but was not observed to be expressed by stromal cells (Fig. 1A; Fig. 2C,D; Additional file 2: Fig. S2C). The gene discussed is VTCN1; the disease is neoplasm.