At least one study of 19 patients shows that it is useful for assessing the presence of CXCR4 receptors in this tumor [68] and may have future potential in this area [69], with various peptides (most prominently 177Lu-Lu-DOTAT-POL3026) being shown to have activity against CXCR4-bearing tumor cells in vitro [70]. Here, CXCR4 is linked to neoplasm.