Since telomerase is not really an oncogene, I'm not sure that the notion of "pre-cancerous" that you're advocating has any meaning. By that token, nearly every

Since telomerase is not really an oncogene, I'm not sure that the notion of "pre-cancerous" that you're advocating has any meaning. By that token, nearly every cell is pre-cancerous, and in a fetus even more so.