Management of gestational hypothyroidism: results of a Brazilian survey

Objectives Evaluate the management of hypothyroidism in fertile-aged and pregnant women and compare these practices to the recommendations of the Brazilian Society of Endocrinology and Metabolism (SBEM) and the Latin American Thyroid Society, published in 2013. Materials and methods In the first trimester of 2014, SBEM made available to all members an electronic questionnaire based on clinical scenarios in the management of gestational hypothyroidism. The responses of 406 physicians, most of them endocrinologists, were analyzed. Results Eighty-one per cent of the endocrinologists screen all their pregnant patients for thyroid dysfunction, mostly during the pregestational period or after the first prenatal visit. Following screening, 82% of the respondents initiate treatment when TSH levels are > 2.5 mIU/L while 67% monitor their pregnant patients even if TSH was normal on first trimester screening. For hypothyroid women who are planning pregnancy, 96% of the clinicians are aware of the importance of adjusting the levothyroxine (LT4) dose as soon as pregnancy is confirmed. However, opinions diverge with respect to adjusting the LT4 dose before or after reassessing thyroid function. The most widely used tests for monitoring pregnant women in use of LT4 are TSH and free T4 (62%) or TSH alone (21%). Unanimously, the treatment goal is to achieve the target TSH level for each trimester of gestation. Conclusion The recommendations of the consensus statements are incorporated into the respondents’ clinical practice. It is noteworthy that the great majority of the clinicians favor universal screening.

Plasmaférese pré-tireoidectomia em paciente com tireotoxicose e hepatotoxicidade por propiltiouracil: relato de caso / Plasmapheresis before thyroidectomy in a patient with thyrotoxicosis and hepatotoxicity by propylthiouracil: case report

A tireotoxicose é uma rara síndrome clínica decorrente da exacerbação do hipertireoidismo, de etiologia e fatores desencadeantes diversos. A abordagem terapêutica pode ser realizada por meio de medicamentos para bloqueio da síntese, secreção e/ou inibição da ação periférica hormonal, além de terapia dirigida aos fatores desencadeantes. Entretanto, em casos refratários, a plasmaférese surge como importante opção de tratamento. Relatamos o caso de um paciente com doença de Graves, internado com quadro de hepatotoxicidade grave por propiltiouracil, que evoluiu com tireotoxicose, sendo indicada plasmaférese para rápida redução dos hormônios tireoidianos, em preparo para a tireoidectomia total.

Thyrotoxicosis is a rare clinical syndrome resulting from an exacerbation of hyperthyroidism, with various etiology and triggering factors. Its approach may be accomplished by blocking the synthesis of hormones, their secretion and/or inhibition of their peripheral action, besides treating the triggering factors. However, in refractory cases, plasmapheresis appears as an important option for treatment. We report a patient with Graves' disease who was admitted with thyrotoxicosis and signs of severe hepatotoxicity induced by propylthiouracil. Plasmapheresis was indicated, with the aim of rapidly reducing thyroid hormones in the preparation for total thyroidectomy.