There is a good deal of data to suggest that they are not very good markers because alpha fetoprotein and these other two markers are also more common and more commonly expressed in advanced cancers.

• 有大量的研究表明它们并不是很好的标志物，因为甲胎蛋白和其他两个标志物也仅仅在晚期癌症表达更加常见。