CXCL12 and neoplasm: Conversely, a significant negative correlation was found between CXCL12 expression and tumor size (r = −0.504, p = 0.033), the stage (r = −0.528, p = 0.014), and the global Weiss score (r = −0.666, p = 0.001), but not with Ki67, as well as two of the Weiss parameters, necrosis (r = −0.906, p < 0.001), and the mitotic figures (r = −0.693, p = 0.004).