Medullary thyroid cancer. Returning to the need to determine the preoperative basal calcitonin level in patients with thyroid nodular pathology

There are International and Russian guidelines for the diagnosis and treatment of medullary thyroid carcinoma. There is a recommendation to determine the basal level of calcitonin for all patients with nodular thyroid disease at the all of these documents. However, this test is not performed for this category of patients routinely even in large clinics for a number of reasons, the main one, which seems to be an economic issue. Six months ago a patient addressed to our clinic who underwent surgical treatment for a papillary carcinoma (follicular variant) of the thyroid gland in the volume of thyroidectomy with pre-tracheal lymphodissection and subsequent course of radioiodine therapy at the place of residence. A relapse of the disease was suspected on the control examination at the place of residence and the patient was sent for consultation to the polyclinic of the N.N. Blokhin National Medical Research Center of Oncology. In our clinic, diagnostic studies were carried out, including a revision of the finished cytological and histological preparations and a conclusion was obtained – medullary carcinoma of the thyroid. Determination of basal level of calcitonin in serum showed a value of 1292 pg/ml. The level of basal calcitonin significantly decreased after repeated surgical treatment. This case shows that in order to avoid such mistake, which is described in our clinical case, it seems necessary to follow the national recommendations, international standards to determine the level of basal calcitonin for all patients with thyroid nodal pathology who consulted and treated in medical institutions.