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Horm Metab Res 1987; 19(8): 391-392
DOI: 10.1055/s-2007-1011833
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© Georg Thieme Verlag, Stuttgart · New York

Seasonal Variation in Thyroid Size in Healthy Males

L. Hegedüs, N. Rasmussen, N. Knudsen
  • Department of Internal Medicine and Endocrinology F and Department of Ultrasound, Herlev Hospital, University of Copenhagen, Denmark, and Department of Gynaecology and Obstetrics, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
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Publikationsverlauf

1986

1987

Publikationsdatum:
14. März 2008 (online)

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Summary

Thyroid volume, measured ultrasonically, and serum levels of T4, T3 and TSH were determined every season during one year in 13 healthy males. A mean variation in thyroid volume of approximately 23% between minimum values (15.8 ± 1.7 ml, summer) and maximum values (19.5±1.9 ml, winter) was found (P < 0.01), although no significant differences in the other thyroid variables could be demonstrated. This seasonal variation in thyroid size should be taken into account when goitre frequency, goitrogenic action of drugs, and goitre treatment effects are evaluated.

Key-Words

Thyroid Function - Thyrotropin - Goitre - Temperature - Ultrasound