Abstract
Quantitative assessment of estrogen receptors alpha (ERα) expression was carried out in 115 samples of non-small cell lung cancer (NSCLC) by an immuno uorescent assay and ow cytometry. It has been shown that high level of ERα ≥20% predicts higher aggressiveness of NSCLC than at low level <20%: median survival at 78 mos of follow-up is increased by 1.5 times; the risk of death is reduced by almost 2.0 times (p = 0.04). Time to death was increased by an average of 18 mos in about 20% of patients with low ERα expression. The results validate informative value of immuno uorescence analysis and owcytometry for quantifying the ERα expression and substantiate the prospects of antiestrogen therapy as a new option for NSCLC treatment, in particular, by analogy with breast cancer - in a long-term adjuvant therapy in ERα+ NSCLC patients.
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