从荷瘤小鼠的卟啉代谢规律中 ,可以看出在癌症早期血清中卟啉含量随病情的发展而增加 ,而晚期则随着病情恶化而减少。有人认为癌症患者晚期的卟啉代谢水平随着病情的恶化而减少是受类胡萝卜素代谢水平变化影响的 ,进而影响了血清荧光法对恶性肿瘤诊断的符合率。通过肿瘤发展过 From the rule of porphyrin metabolism in tumor-bearing mice, it can be seen that the content of porphyrin in the serum of early stage of cancer increases with the progression of the disease, while the later phase decreases with the progression of the disease. Some people think that advanced cancer patients with reduced levels of porphyrin metabolism with the deterioration of the disease is affected by changes in the level of carotenoid metabolism, and thus affect the accuracy of serum fluorescence in the diagnosis of malignant tumors. Through the tumor developed