[Tracheal stenosis as the presenting form of follicular thyroid carcinoma].

Follicular carcinoma of the thyroid is an uncommon neoplasm, whose diagnosis is usually established upon evaluating a thyroid nodule. However, on occasions it can be presented with symptoms derived from the adjacent structures' compression, as the trachea, since only it is presented in reduced number of patients with substernal goiter. We present a rare case of a woman 73 years-old, with follicular carcinoma of the thyroid, that consulted for 5 years-old evolution dyspnea and wheezing, without finding alterations in the initial roentgenogram of the chest. We comment the difficulty in the diagnosis of the upper airway obstruction when the roentgenogram of the chest is normal, and we comment the clinical and pulmonary function data that can lead us to suspect this disease.