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Korean Journal of Obstetrics & Gynecology 2005;48(7):1739-1751.
Published online July 1, 2005.
The Correlation of Serum Level of Tumor Marker CA125 and CA19-9 and Severity of Endometriosis.
Min Jung Kwack, Keon Jin
Department of Obstetrics and Gynecology, College of Medicine, Dankook University, Cheonan, Korea. hockim@nongae.gsnu.ac.kr
Abstract
OBJECTIVE
The purpose of this study is to evaluate the clinical usefulness of serum level of CA125 and CA19-9 to assess the severity of endometriosis. METHODS: The study was conducted on 80 patients with histologically diagnosed endometriosis and 20 patients in control group. Preoperative serum CA125 and CA19-9 levels were measured by immunoradiometric assay and the severity of disease was staged according to the revised American Fertility Society (1985) classification system. RESULTS: Both serum level of CA125 and CA19-9 in endometriosis patient (81.7+/-120.44 U/mL, 47.1+/-80.74 U/mL, Mean+/-SD) were higher than control group (10.8+/-6.48 U/mL, 11.7+/-8.82 U/mL, Mean+/-SD)(p=0.001, p=0.054). The serum CA125 level increased significantly according to stages (p=0.051), but serum CA19-9 level showed an increasing trend (p>0.05). With the cutoff value of CA125 with 35 U/mL and CA19-9 with 37 U/mL, overall positive rate for CA125, CA19-9, and CA125 combined with CA19-9 was 45.1%, 33.8%, and 52.5%. There was no difference between the positive rate with CA125 combined with CA19-9 (52.5%) and that with CA125 alone (45.1%)(p>0.05). With the cutoff value of CA125 with 15 U/mL and CA19-9 with 9 U/mL, overall positive rate for CA125, CA19-9, and CA125 combined with CA19-9 was 82.5%, 76.3%, and 92.5%, the positive rate with CA125 combined with CA19-9 (92.5%) was higher than that with CA125 alone (82.5%)(p=0.056). CONCLUSION: Because the positive rate with combined serum CA125 and CA19-9 level is not higher than that with serum CA125 alone for the severity assessment of endometriosis, it is recommended to use serum CA125 level alone.
Key Words: Endometriosis, Severity, CA125, CA19-9


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