March 2021 in “AACE clinical case reports” A man with both Klinefelter syndrome and primary hyperparathyroidism showed a rare combination of symptoms and genetic patterns.
29 citations
,
January 2009 in “International Journal of Trichology” Finasteride for hair loss may cause gynecomastia; doctors should inform patients.
3 citations
,
September 2019 in “American Journal of Men's Health” Finasteride may not affect gynecomastia recurrence after mastectomy.
April 2024 in “JCEM case reports” A man's breast enlargement from low-dose finasteride for hair loss didn't go away, even with treatment, and might be more common than reported.
September 2025 in “Journal of Psychiatry Spectrum” Mirtazapine can cause male breast enlargement.