Figure 2. Association between HOXD1, HOXD3, and HOXD4 expression and tumor stage and histological grade in cancers. (A–C) Association between HOXD1, HOXD3, and HOXD4 expression and tumor stage in 21 cancers. (D–F) Association between HOXD1, HOXD3, and HOXD4 expression and histological grade in 11 cancers.