Objectives: To study of the association between thyroid carcinoma and Hashimoto's thyroiditis (HT).
Material and methods: [corrected] Retrospective study of 78 patients undergoing surgery between 2001 and 2002, with a pathological diagnosis of Hashimoto's thyroiditis. The clinical data and complementary tests performed before surgery are reported.
Results: The mean age was 44.6 years, with 77 females and only one male. There were 12 cases of thyroid cancer associated with HT, mostly with the nodular form, with 11 papillary carcinoma (14.1%) and one non-hodgkin B lymphoma of the thyroid. Tumor size varied from 4 to 60 mm with a mean of 26 mm. There was one microcancer (size<10 mm).
Conclusions: We did not find an increased incidence of thyroid cancer associated with this highly selected population of HT patients.