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. 1987 Dec;56(6):820–824. doi: 10.1038/bjc.1987.297

Comparison of mammary serum antigen (MSA) and CA15-3 levels in the serum of patients with breast cancer.

N P Sacks 1, S A Stacker 1, C H Thompson 1, J P Collins 1, I S Russell 1, J A Sullivan 1, I F McKenzie 1
PMCID: PMC2002392  PMID: 2449238

Abstract

Serum levels of mammary serum antigen (MSA) and CA15-3 were evaluated in 135 individuals in order to determine their single and combined value in the diagnosis and monitoring of breast cancer. Raised MSA levels (greater than 300 IU) were found in 68% of patients with Stage I and II breast cancer compared to only 3% having raised CA15-3 levels (greater than 40 U ml-1). Of 38 patients with Stage IV breast cancer, 95% had raised levels of MSA and CA15-3 combined with each test individually detecting 82% of those with Stage IV disease. No correlation was found between MSA and CA15-3 levels. Four patients being treated for breast cancer were followed over a 5-17 week period; MSA levels correlated with disease course in 3 and CA-15 in 2. The overall sensitivity, specificity and accuracy in detecting breast cancer were 76%, 91% and 96% for MSA; and 47%, 95% and 97% for CA15-3 respectively. When both tests were used together combined evaluation gave the highest sensitivity (84%) and specificity (100%). MSA seems to be superior to CA15-3 for early breast cancer diagnosis and a combination of the two tests gave the best results for metastatic disease.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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