Gynecomastia associated with low-dose methotrexate therapy for rheumatoid arthritis ameliorated by folate supplement
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- Fukushi, J., Nakashima, Y. & Iwamoto, Y. Rheumatol Int (2010) 30: 1371. doi:10.1007/s00296-009-1062-9
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A 62-year-old male with a 10-year history of seropositive rheumatoid arthritis (RA) developed gynecomastia 8 months after beginning oral low-dose methotrexate (MTX) therapy. Two months after folate supplementation, the gynecomastia symptoms improved. Gynecomastia associated with low-dose MTX is a rare occurrence, with only nine cases previously reported in the literature. This is the first report showing folate supplementation to be effective against gynecomastia following low-dose MTX. Although it occurs infrequently, gynecomastia associated with low-dose MTX therapy should be considered in male patients with RA.