Table 3 Results of study from Brasil, including 106 acromegalic patients, who were subjected to thyroid US examination [5]. In 4 patients (3.8%) thyroid carcinoma was diagnosed in cytological examination (2 cases - multifocal papillary thyroid carcinoma, 1 - papillary microcarcinoma, 1 - papillary variant of follicular thyroid carcinoma).