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BMJ Case Reports 2009; doi:10.1136/bcr.06.2009.1982
  • Other full case

Contrast induced hyperthyroidism due to iodine excess

  1. Usman Mushtaq1,
  2. Timothy Price2,
  3. Narsing Laddipeerla3,
  4. Amanda Townsend2,
  5. Vy Broadbridge2
  1. 1
    The Queen Elizabeth Hospital, Medicine, 28-Woodville Road, Woodville South, Adelaide, South Australia, 5011, Australia
  2. 2
    The Queen Elizabeth Hospital, Oncology, 28-Woodville Road, Woodville South, Adelaide, South Australia, 5011, Australia
  3. 3
    The Queen Elizabeth Hospital, Diabetes and Endocrine, 28 Woodville Road, Woodville South, Adelaide, South Australia, 5011, Australia
  1. Usman Mushtaq, drusmanm{at}hotmail.com
  • Published 4 November 2009

Summary

Iodine induced hyperthyroidism is a thyrotoxic condition caused by exposure to excessive iodine. Historically this type of hyperthyroidism has been described in areas of iodine deficiency. With advances in medicine, iodine induced hyperthyroidism has been observed following the use of drugs containing iodine—for example, amiodarone, and contrast agents used in radiological imaging. In elderly patients it is frequently difficult to diagnose and control contrast related hyperthyroidism, as most of these patients do not always present with typical signs and symptoms of hyperthyroidism. Treatment can be very challenging as drugs commonly used to treat hyperthyroidism have little effect on already formed thyroid hormone due to iodine excess.

Footnotes

  • Competing interests: none.

  • Patient consent: Patient/guardian consent was obtained for publication

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