Document Detail

Post-partum thyroiditis in South Brazil presenting as thyrotoxicosis: prevalence and risk factors.
MedLine Citation:
PMID:  11021764     Owner:  NLM     Status:  MEDLINE    
The prevalence of post-partum thyroiditis (PPT) has been reported in several countries (1.9 to 16.7%) but is not known in Brazil. Several factors have been associated to its development, such as a female sex of the newborn, PPT in a previous pregnancy, a family history of thyroid disease and cigarette smoking. To investigate the prevalence of PPT and its risk factors in a southern Brazilian city, a three-cross-sectional observation study was performed. PPT was diagnosed in 14/284 subjects (5.3%) and all cases had thyrotoxicosis (13 sub-clinical and one clinical). Serum total T4 and free T4 were higher and serum TSH was lower in PPT subjects. Anti-thyroid antibodies were positive in 16.7% of PPT subjects and in 4.5% of those with no thyroid dysfunction. Goiter was identified in 14.3% of PPT subjects and in 15% of no PPT subjects. Thyroid was hardened more frequently in PPT subjects (21.4%) than in others (5.2%). Male sex of the newborn was associated to PPT, increasing 11 times the risk of PPT. Cigarette smoking was associated to PPT in group II subjects. There was no clinical sign or symptom able to contribute to this diagnosis, except the presence of hardened thyroid. Based on these findings, PPT, manifesting itself as mild thyrotoxicosis, is a common problem in southern Brazil and is associated to male sex of the newborn.
T W Furlanetto; M O Premaor; M L Caramori; B C Frantz; G Z Patta; E Tatto; A G Vaz
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of endocrinological investigation     Volume:  23     ISSN:  0391-4097     ISO Abbreviation:  J. Endocrinol. Invest.     Publication Date:  2000 Sep 
Date Detail:
Created Date:  2001-01-10     Completed Date:  2001-01-25     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7806594     Medline TA:  J Endocrinol Invest     Country:  ITALY    
Other Details:
Languages:  eng     Pagination:  496-501     Citation Subset:  IM    
Serviço de Medicina Interna, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Brazil.
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MeSH Terms
Autoantibodies / blood
Brazil / epidemiology
Cross-Sectional Studies
Prospective Studies
Puerperal Disorders / diagnosis,  epidemiology*
Risk Factors
Thyroid Diseases / genetics
Thyroid Gland / immunology
Thyroiditis / diagnosis,  epidemiology*
Thyrotoxicosis / diagnosis,  epidemiology*
Thyrotropin / blood
Thyroxine / blood
Reg. No./Substance:
0/Autoantibodies; 7488-70-2/Thyroxine; 9002-71-5/Thyrotropin

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