CXCR4 and neoplasm: Positive CXCR4 expression was found in 195 (79.9%) samples of tumor tissues and 12 (4.9%) samples of normal tissues, while positive cases for CXCR5 and CCR7 were 155 (63.5%) and 117 (48.0%) samples of tumor tissues and 15 (6.1%) and six (2.5%) samples of normal tissues, respectively (Table 2).