[Atypical forms of hyperthyroidism]

Except from well-known the most frequent reasons of the hyperthyroidism such as the Graves-Basedow disease, multinodular goitre and the autonomous adenoma we should also remember the other rarer illnesses leading to the excess of thyroid hormones in the serum. Authors presented the problem of atypical forms of thyrotoxicosis which run without the overproduction of thyroid hormones and are characterized by low 24 h 131 J uptake by the thyroid gland. So called masks of hyperthyroidism such as apathetic, neuromuscular, gastrointestinal and cardiovascular forms were also discussed in the article.