1. Abstract Cuncurrent Thyroid Cancer (CT) and hyperthyroidism is rare though increasly being reported. The association is extremely variable as indicated in the medical literature currently available. Several factors have been proposed to explain the variability of results: geographic areas, neck irradiation, type of surgery in patient with hyperthyroidism, radioactive iodine. During the period between 2012 and 2022 a total of 398 patient underwent thyroid surgery, 232 patient underwent surgery for hyperthyroidism. In 23 patients were found cuncurrent thyroid cancer and hyperthyroidism. Patient with multinodular toxic goiter had associated malignances in 8,6% (12/138), while patient with uninodular toxic goiter had an incidence of 6.1% (4/65) ; Patients with toxic adenoma had an incidence of CT of 11.8% (2/17) .
