Abnormality of the pharynx An anomaly of the pharynx, i.e., of the tubular structure extending from the base of the skull superiorly to the esophageal inlet inferiorly. The pharynx is tubular structure extending from base of skull superiorly to esophageal inlet inferiorly, and is composed of three distinct areas: the nasopharynx, the oropharynx, and the hypopharynx, with the pharyngeal walls being composed of the superior, middle, and inferior pharyngeal constrictor muscles. It is part of the digestive system and of the conducting zone of the respiratory system. UMLS:C4025838 Abnormality of the upper respiratory tract