The other is the Roche method. The Roche method has a wider band of what is considered normal. It's important you understand what testing method your lab uses and to have consistent measurements for the basis of comparison for trending. If you shift labs, expect to have at least 2 CEA tests done to establish the new basis for comparison.
Zane /zane/ [1 syll.] as a boys' name is pronounced zayne. It is of Hebrew origin, and the meaning of Zane is God is gracious. Possibly a variant of Hebrew John, or a variant of a Scandinavian surname.
Zayn (pronounced ZANE) is the seventh letter of many Semitic abjads, including Phoenician, Aramaic, Hebrew Syriac, and Arabic alphabet. The letter is called zayn and is written is several ways depending in its position in the word.