Felix Quataert, Bert Bravenboer, Marleen Keyaerts, Corina Emilia Andreescu
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The Presence of Anti-TPO Antibodies Increase the Likelihood of Post-I131 Hypothyroidism.
The use of radioactive iodine in the treatment of hyperthyroidism is common practice. However, a standardized treatment protocol with regard to radioactive iodine treatment (RAI) remains subject to discussion. We retrospectively analyzed 100 patient records. Patient diagnosis, age, gender, body mass index (BMI), dose of radioactive iodine, thyroid size, the 24 h radioiodine uptake (24 h RAIU) and protein bound iodine (PBI) were deducted, as well as the use of antithyroid drugs prior to RAI. Biochemical parameters were obtained, such as TSH, fT4, fT3, Anti-TPO, Anti-TG antibodies and thyroid stimulating antibodies. After 5 years of follow-up, 46% of the patients proved to be hypothyroid, whereas 8% of the patients were not cured after one dose of RAI. One year after RAI, a larger proportion of patients with a toxic nodule developed hypothyroidism compared to patients with a multinodular goiter (MNG) (44.2% vs. 21.2%). Radioactive iodine dose, PBI, RAIU, BMI, size of the thyroid gland, diagnosis, age and TPO-antibodies showed statistically significant differences in the development of hypothyroidism. Furthermore, thiamazole pretherapy was shown to be a predictor of hypothyroidism, as well as a high PBI value, exhibiting a positive predictive value of 85.2% when the PBI exceeded 0.16. We suggest a standardized measurement of TPO-Ab's to further determine their role in the development of hypothyroidism after RAI. The empirical dosing regimen was very effective, illustrating a 92% cure rate after 1 dose.
期刊介绍:
Covering the fields of endocrinology and metabolism from both, a clinical and basic science perspective, this well regarded journal publishes original articles, and short communications on cutting edge topics.
Speedy publication time is given high priority, ensuring that endocrinologists worldwide get timely, fast-breaking information as it happens.
Hormone and Metabolic Research presents reviews, original papers, and short communications, and includes a section on Innovative Methods. With a preference for experimental over observational studies, this journal disseminates new and reliable experimental data from across the field of endocrinology and metabolism to researchers, scientists and doctors world-wide.