Surgery is the treatment of choice for thyroid cancer, often followed by I131 and thyroid hormone to control the local residual tumor and distant metastasis. Hundred and sixty-two patients with thyroid disease underwent surgery at the Division of Surgical Oncology of the Cancer Institute in Genoa. Thirty cases presented no malignant hot thyroid nodules, 37 of the other 132 cases were cancers (28%). In 23 cases (62%), the pathological diagnosis was papillary carcinoma, in ten cases (27%) follicular carcinoma, in four (11%) medullary carcinoma. In 13 cases (35%) (ten papillary carcinoma, two follicular carcinoma, one medullary carcinoma) the lesion was multicentric. Our data suggest that total thyroidectomy, performed in two steps, in most cases does not carry important post-operative morbidity but offers the greatest potential for cure. In our cases only one patient died (of the cancer). After radical surgery it is possible to detect and treat metastases by I131.