Abstract: The objective was to investigate the association between the level of serum CA₁₂₅ before operation and the gradation, the relapse rate and the prognosis of the carcinoma of endometrium. The level of serum CA₁₂₅ was matured before the patients'operations by using chemiluminescent immunoas-say. With the rise of the gradation of the carcinoma of endometrium, the level of serum CA₁₂₅ and the positive rate both increased. The worse the differentiation, the higher the level of serum CA₁₂₅ and positive rate (P<0.05). The level of serum CA₁₂₅ before operation is clinically valuable in both the gradation and the prognosis of the carcinoma of endometrium.

Key words: carcinoma of endometrium, serum CA₁₂₅, chemiluminescent immunoassay