Serum negative autoimmune thyroiditis displays a milder clinical picture compared with classic Hashimoto's thyroiditis.

@article{Rotondi2014SerumNA,
  title={Serum negative autoimmune thyroiditis displays a milder clinical picture compared with classic Hashimoto's thyroiditis.},
  author={Mario Rotondi and Luca de Martinis and Francesca Coperchini and Patrizia Pignatti and Barbara Pirali and Stefania Ghilotti and Rodolfo Fonte and Flavia Magri and Luca Chiovato},
  journal={European journal of endocrinology},
  year={2014},
  volume={171 1},
  pages={
          31-6
        }
}
BACKGROUND Despite high sensitivity of current assays for autoantibodies to thyroperoxidase (TPO) and to thyroglobulin (Tg), some hypothyroid patients still present with negative tests for circulating anti-thyroid Abs. These patients usually referred to as having seronegative autoimmune thyroiditis (seronegative CAT) have not been characterized, and definite proof that their clinical phenotype is similar to that of patients with classic chronic autoimmune thyroiditis (CAT) is lacking… 

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