肝癌是世界上死亡率最高的五大癌症之一。绝大多数患者的致病因素可归结为受到乙型肝炎病毒的感染或长期高水平的摄入黄曲霉毒素。但要在早期检验出这两种致癌因素的影响是很困难的,因为它们的潜伏期可达两年。最近,美国化学家、约翰·霍普金斯大学卫生学与公众健康学院的约翰·格罗普曼找到一种早期肝癌检验法:测定尿样中的一种加合 Liver cancer is one of the five most common cancers in the world. The pathogenic factors in the vast majority of patients can be attributed to infection with hepatitis B virus or long-term high levels of aflatoxins. However, it is very difficult to test the impact of these two carcinogenic factors at an early stage because their incubation period can reach two years. Recently, American chemist John Gropman of the Johns Hopkins School of Hygiene and Public Health found an early liver cancer test: an addiction in urine samples