In 13 cases difficulty airway, predictive factors were linked difficult intubation is 30.8% interincisor gap < 4 cm, 38.5% thyromental distance < 6 cm, 30.8% Mallampati class III, 38.5% Cormack - Lehane grade III, 7.7% thoracic goiter associated with tracheal deviation or compression and presence of dyspnea.