Sunitinib, a tyrosine kinase inhibitor, has been approved for the treatment of cancers, such as advanced renal cell carcinoma (RCC). On the other hand, sunitinib treatment is known to induce thyroid dysfunction in a substantial proportion of patients treated for advanced RCC; in fact, hypothyroidism is a frequent complication. However, little is known about sunitinib-induced thyrotoxicosis and ...

Thyrotoxicosis is associated with increased cardiovascular morbidity and mortality, primarily due to heart failure and thromboembolism. Palpitations, caused by sinus tachycardia and occasionally by atrial fibrillation, are the most frequent cardiovascular symptom. As atrial fibrillation may be the only manifestation of thyrotoxicosis, thyroid hormone excess should routinely be excluded in patie...

UNLABELLED Thyrotoxicosis is an under-recognised but clinically important complication of parathyroidectomy. We report a case of a 37-year-old man with tertiary hyperparathyroidism who initially developed unexplained anxiety, diaphoresis, tachycardia, tremor and hyperreflexia one day after subtotal parathyroidectomy. Thyroid biochemistry revealed suppressed thyroid stimulating hormone and eleva...

BACKGROUND A study had reported that a low TSH level is associated with elevated plasma fibrinogen (FIB) levels. Our purpose was to investigate the role of FIB in the differential diagnosis of thyrotoxicosis. METHODS The data of 104 patients with primary thyrotoxicosis at the First Hospital of China Medical University from July 2010 to March 2011 were analyzed and divided into three groups: 4...

Thyroid hormone producing thyroid carcinoma is an uncommon cause of thyrotoxicosis. A patient with extensive hepatic metastases from well-differentiated carcinoma is presented. Administration of amiodarone for atrial fibrillation led to the development of hyperthyroidism. Precipitation of thyrotoxicosis by iodine-containing compounds in patients with thyroid carcinoma is rare. The relatively hi...

Myocardial infarction occurs rarely with thyrotoxicosis. A 34-year-old woman with thyrotoxicosis sustained a transmural myocardial infarction and subsequently on cardiac catheterization studies had no significant coronary arterial disease but only residual apical wall akinesia. Thyroid hormone may directly influence myocardial oxygen supply and demand and, by some unknown mechanism exclusive of...

Thyrotoxic periodic paralysis (TPP) is a life-threatening neuromuscular complication of thyrotoxicosis characterized by muscle weakness and hypokalemia and with an unclear etiopathogenesis. However, the 17q24.3 locus had been genetically linked to TPP, in which the genetic variant rs312691 (TC genotype) in long intergenic noncoding RNA (lincRNA) CTD-2378E21.1 is located downstream of inward-rec...

Apart from the common causes of thyrotoxicosis, such as Graves' disease and functioning nodular goiters, there are more than 20 less common causes of elevated free thyroid hormones that produce the symptoms and signs of thyrotoxicosis. This review describes these rarer conditions and includes 14 illustrative patients. Thyrotropin and free thyroxine should be measured and, when the latter is nor...

Familial dysalbuminaemic hyperthyroxinaemia (FDH) can be confused with thyrotoxicosis if clinical signs and laboratory tests are misinterpreted. We describe three members of the same family with FDH who were erroneously treated for thyrotoxicosis. Screening of other family members resulted in the discovery of a further six patients at risk of being misdiagnosed as thyrotoxic. Clinical and bioch...