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. 2006 Jul 6;124(4):223-7.
doi: 10.1590/s1516-31802006000400010.

Positive correlation between serum and peritoneal fluid CA-125 levels in women with pelvic endometriosis

Vivian Ferreira do Amaral  1 , Rui Alberto Ferriani, Marcos Felipe Silva de Sá, Antonio Alberto Nogueira, Julio César Rosa e Silva, Ana Carolina Japur de Sá Rosa e Silva, Marcos Dias de Moura
Affiliations

Positive correlation between serum and peritoneal fluid CA-125 levels in women with pelvic endometriosis

Vivian Ferreira do Amaral et al. Sao Paulo Med J. .

Abstract
in English, Portuguese

Context and objective: One of the diagnostic markers of endometriosis is CA-125, and elevated levels of this are caused by high concentrations in the ectopic endometrium. The objective of this study was to correlate CA-125 levels in serum and peritoneal fluid from women with and without pelvic endometriosis.

Design and setting: This was a prospective, cross-sectional, controlled study of consecutive patients undergoing laparoscopy for infertility, pelvic pain or tubal ligation, during early follicular phase, at the university hospital of Faculdade de Medicina de Ribeirão Preto.

Methods: Fifty-two patients were divided into two groups: endometriosis group, consisting of 35 patients with biopsy-confirmed pelvic endometriosis, and control group, consisting of 17 patients without endometriosis. CA-125 levels in serum samples and peritoneal fluid were determined by chemiluminescence.

Results: CA-125 levels in serum and peritoneal fluid were higher in patients with advanced pelvic endometriosis (means of 39.1 +/- 45.8 U/ml versus 10.5 +/- 5.9 U/ml in serum, p < 0.005; 1,469.4 +/- 1,350.4 U/ml versus 888.7 +/- 784.3 U/ml in peritoneal fluid, p < 0.05), and showed a positive correlation between each other (correlation coefficient (r) = 0.4880). Women with more advanced degrees of endometriosis showed higher CA-125 levels in both serum and peritoneal fluid (p = 0.0001).

Conclusion: There is a positive correlation between serum and peritoneal fluid values of CA-125 in women with and without endometriosis, and their levels are higher in peritoneal fluid. Advanced endometriosis is related to higher levels in both serum and peritoneal fluid.

CONTEXTO E OBJETIVO:: Um dos marcadores diagnósticos de endometriose é o CA-125, e seus níveis elevados são devidos à alta concentração no endométrio ectópico. O objetivo deste estudo foi correlacionar os níveis de CA-125 no soro e fluido peritonial de mulheres com e sem endometriose pélvica.

TIPO DE ESTUDO E LOCAL:: Estudo prospectivo, longitudinal, controlado, de pacientes consecutivas submetidas a laparoscopia por infertilidade, dor pélvica ou laqueadura tubária, durante a fase folicular precoce no Hospital Universitário da Faculdade de Medicina de Ribeirão Preto.

MÉTODOS:: Cinqüenta e duas pacientes foram divididas em dois grupos: grupo endometriose, com 35 pacientes com biópsia confirmada de endometriose pélvica, e grupo controle, com 17 pacientes sem endometriose. Níveis de CA-125 em amostras no soro e fluido peritonial foram determinadas por quimiluminescência.

RESULTADOS:: Os níveis de CA-125 no soro e fluido peritonial foram mais altos nas pacientes com endometriose pélvica avançada (média 39,1 ± 45,8 U/ml versus 10,5 ± 5,9 U/ml no soro, p < 0,005, 1469,4 ± 1350,4 U/ml versus 888,7 ± 784,3 U/ml no fluido peritonial, p < 0,05), e o estudo mostrou uma correlação positiva entre eles (coeficiente de correlação = 0,4880). Mulheres com estágios mais avançados de endometriose mostraram níveis de CA-125 maiores em ambos soro e fluido peritonial (p = 0,0001).

CONCLUSÃO:: Há uma correlação positiva entre os valores de CA-125 no soro e no fluido peritonial em pacientes com e sem endometriose e seus níveis são maiores no fluido peritonial. Endometriose avançada é relacionada com níveis mais altos de CA-125 em ambos soro e fluido peritonial.

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Conflict of interest statement

Conflict of interest: Not declared

Figures

Figure 1
Figure 1. Mean CA-125 levels in serum (S) and peritoneal fluid (PF) from women with and without pelvic endometriosis.
Figure 2
Figure 2. Correlation between CA-125 levels in serum (S) and peritoneal fluid (PF) from women with pelvic endometriosis.
See this image and copyright information in PMC

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