LOH at APC/MCC locus plays an important role at the early stage of carcinogenesis and progress, while LOH at DCC locus occurs at a later stage and may be correlated with prognosis of patiets. APC／MCC基因LOH在胃癌的早期发生及发展中起作用，而DCC基因LOH则是晚期改变，可能与临床预后相关。从例句中可以看出 后期：at a later stage.另外，a later period; a latter part 也有此意。
向上七季
