Abstract
Background/Aims: The aim of this research was to analyze digit ratio in relation to estrogen receptor (ER) and progesterone receptor (PR) expression and to verify digit ratio (2D: 4D) as a marker of ER and PR overexpression in the male breast. Methods: This study included 35 patients who underwent breast reduction due to the idiopathic form of gynecomastia. The average age of the studied individuals was 25.7 years (SD = 7.8). ER and PR expression was detected in breasts, and digit ratios were calculated in patients with idiopathic gynecomastia. Results: ER expression did not correlate with the right (p = 0.51) and left 2D: 4D (p = 0.97). Also, there was no correlation between PR expression and 2D: 4D. A lack of correlation between these variables may result from the fact that the analyzed group of men with idiopathic gynecomastia was small in number, but at the same time, it appeared to be homogenous in these aspects (positive ER and/or PR expression and high digit ratio). Conclusion: High digit ratio in men with gynecomastia may tend to be a marker of overexpression of ER and PR. This may justify an early use of tamoxifen in men with gynecomastia and a high digit ratio.
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