Spindle tumor cells show prominent cytoplasmic staining for smooth muscle actin (SMA), vimentin, CD34, and calponin, diffuse nuclear staining for SOX11, and significant nuclear and cytoplasmic staining for β-catenin, which globally support that the spindle cells are fibroblasts and myofibroblasts, which can produce collagen [106–108]. This evidence concerns the gene CD34 and neoplasm.