[Insular carcinoma of the thyroid gland. Observation of a clinical case].

We present a case report about a patient affected by an "insular" thyroid carcinoma, a poorly differentiated carcinoma, situated morphologically and biologically in an intermediate position between the well-differentiated (papillary and follicular) and the totally undifferentiated thyroid tumors. We believe that its separation from other types of thyroid cancer will lead to a more accurate estimate of its prognosis and a more aggressive therapeutic approach.