Abstract
Based on the medical records of patients with medullary thyroid carcinoma treated in the period from 1979 to 2012 years, using the Kaplan-Meier method, it was found that the sporadic form of the disease and male sex of patients are negative predictors of disease. Other is essential for patients with sporadic form of medu llary cancer, because sex has no prognostic value in patients with hereditary forms of the disease. The presence of metastases in regional lymph nodes or distant metastases is a poor prognostic factor and analyzesthe significance of the severity of the disease showed that patients belonging to the male sex are also a negative factor on prediction.In determining surgical treatment it is necessary to consi der the size of the tumor: the presence of carcinoma larger than 2 cm (even proved with absence of metastasis) increases mortality and reduces the survival of patients with medullary thyroid cancer.