Introduction Carotid sinus syndrome (CSS) is defined as syncope or pre-syncope associated with at least 3 seconds of asystole (cardioinhibitory response) and/or a drop of at least 50 mmHg in arterial systolic blood pressure (vasodepressor response) in response to stimulation of the carotid sinus. First recognized by Weiss and Baker in 1933, there have been since then reports of the association between neck masses and the occurrence of syncope. Among its causes is carcinoma ex-pleomorphic adenoma (CXAP), a rare malignant […]