[Treatment of differentiated thyroid cancers of nodular type]

Papillary and follicular carcinomas are the most frequent thyroid cancers. The choice of the treatment is dependent on the prognostic scoring systems. A good prognosis is linked to the small size of the nodule (especially) microcarcinoma) the age of the patient (less than 40), the lack of extra-thyroid (for papillary cancer) or extra capsular (for follicular carcinoma) extension. Total thyroidectomy decreases the number of recurrences but does not modify the mortality. The risk of laryngeal nerve palsy and hypoparathyroidism is not negligible. Lobo-isthmectomy thus can be used in the low risk tumors. Radioactive iodine administration is rational after total thyroidectomy but its efficacy is questioned. Thyroxine treatment is always prescribed. Taking into account the risk of osteopenia and cardiovascular disturbances induced by iatrogenic thyrotoxicosis, the desirable serum TSH level is debated.