Bone mineral density in treated at a young age for differentiated thyroid cancer after chernobyl female patients on TSH-suppressive therapy receiving or not Calcium-D3 supplementation

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Abstract

Long-term management of patients with differentiated thyroid cancer (DTC) commonly includes TSHsuppressive therapy with L-T4 and, in case of postsurgical hypoparathyroidism, Calcium-D3 supplementation, both of which may affect skeletal health. Experience with female patients treated for DTC at a young age and who were then receiving long-term therapy with L-T4 and Calcium-D3 medication is very limited to date. This cross-sectional study set out to investigate effects of Calcium-D3 supplementation and TSH-suppressive therapy on bone mineral density (BMD) in 124 young female patients treated for DTC at a mean age of 14 years and followed-up for an average of 10 years. BMD was found to be significantly higher in patients receiving Calcium-D3 medication than in patients not taking supplements. The level of ionized calcium was the strongest factor determining lumbar spine BMD in patients not receiving Calcium-D3 supplementation. Pregnancy ending in childbirth and HDL-cholesterol were associated with a weak adverse effect on spine and femoral BMD. No evidence of adverse effects of L-T4 and of radioiodine therapies on BMD was found. We conclude that Calcium-D3 medication has a beneficial effect on BMD, and that TSH-suppressive therapy does not affect BMD in women treated for DTC at young age, at least after 10 years of follow-up.

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Leonova, T. A., Drozd, V. M., Saenko, V. A., Mine, M., Biko, J., Rogounovitch, T. I., … Yamashita, S. (2015). Bone mineral density in treated at a young age for differentiated thyroid cancer after chernobyl female patients on TSH-suppressive therapy receiving or not Calcium-D3 supplementation. Endocrine Journal, 62(2), 173–182. https://doi.org/10.1507/endocrj.EJ14-0408

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