The influence of plasma estrogen levels on disease-free interval (time from primary treatment to first relapse, DFI) in breast cancer patients is not known.
Any relation between plasma estrogens and the outcome in breast cancer patients may have implications considering use of hormone replacement therapy (HRT) in patients treated for breast cancer.
We measured plasma estradiol (E2), estrone (E1), and estrone sulfate (E1S) in 92 postmenopausal women with breast cancer relapse and correlated plasma estrogen levels to the length of their disease-free interval (DFI1) and the length of the DFI in the subgroup of patients in whom this extended a time period of more than 2 years (DFI2).
The length of DFI2 correlated negatively to plasma level of E1S (p<0.025) and E2 (p<0.05) and to the E2/E1 and E1S/E1 ratios (p<0.05), while the length of DFI1 correlated negatively to plasma level of E1S (p<0.025) and the E1S/E1 ratio (p<0.005).
We also analyzed for possible correlations between DFIs and plasma estrogen levels in subgroups based on tumor stage at diagnosis and previous therapy.
In general, these subgroup analyses revealed negative correlations of statistical significance or borderline significance between the DFI1 and DFI2 and E2 and the E2/E1 ratio and non-significant negative correlations between plasma levels of E1S and DFI1 and DFI2. (...)
Mots-clés Pascal : Estradiol, Oestrone, Durée, Récidive, Tumeur maligne, Glande mammaire, Stade avancé, Postménopause, Homme, Femelle, Taux concentration, Sang, Urine, Oestrogène, Hormone stéroïde sexuelle, Hormone ovarienne, Glande mammaire pathologie
Mots-clés Pascal anglais : Estrone, Duration, Relapse, Malignant tumor, Mammary gland, Advanced stage, Postmenopause, Human, Female, Concentration factor, Blood, Urine, Estrogen, Sex steroid hormone, Ovarian hormone, Mammary gland diseases
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 96-0446580
Code Inist : 002B20E02. Création : 10/04/1997.