in the head and neck region, tracheal and larynx paragangliomas are much less common and subglottic paragangliomas have been rarely reported. less than 60 cases with larynx paraganglioma and a few cases with ‎trachea paraganglioma have been reported ‎until know in the literature. ‎this report describes a 28 year old man suffering from progressive dyspnea due to tracheal and subglottal tumor. ‎h...

introduction: nitric oxide is an important endogenous compound that acts as bronchodilator in trachea. electromagnetic fields (emf) affect nitric oxide level in different tissues. the interaction of nitrergic and cholinergic systems in airways has been reported. therefore, the present study was performed to evaluate the interaction of cholinergic and nitrergic systems in the trachea of rats tha...

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Introduction: Double aortic arch (DAA) is a congenital anomaly of the aortic arch. It is the most common type of complete vascular ring. When it occurs, the connected segment of the aortic arch and its branches encircle the trachea and esophagus, leading to symptoms related to these two structures. Case Report: We present a case of a newborn baby who developed biphasic stridor immediately after...