《Oncology Times》1984;6(1):16. 美国宾夕法尼亚大学的外科研究和药理学副教授K C Tsou说,采用放射性肝扫描检查是否有肝转移之前,检查血清中的5′-核苷酸-磷酸二酯酶的同功酶-V(5′-NPD-V)可作为肝转移早期警告的标记。该试验的敏感程度为95％左右,特异性为77％左右。在Tsou与W T Iaouye等合作进行的前瞻性研究中发现,上述的酶试验正确地预测了41 Oncology Times 1984;6(1):16. KC Tsou, associate professor of surgical research and pharmacology at the University of Pennsylvania, said that 5′-nucleotide-phosphate in the serum is examined before using a radioactive liver scan to detect liver metastases. Diesterase isoenzyme-V (5’-NPD-V) may serve as a marker for early warning of liver metastases. The test has a sensitivity of about 95% and a specificity of about 77%. In a prospective study conducted in collaboration with Tsou and W T Iaouye et al., the above enzyme test correctly predicted 41