title: Persistent pharyngeal pouch derivatives in the neonate.
abstract: Internal branchial sinuses are rare compared to other branchial anomalies. A case is described in which such a sinus presented as an air-containing inflammatory lateral neck mass in a neonate and evidence is presented to support the theory that this originated from the fourth pharyngeal pouch. Review of six similar cases from the literature shows this to be a well-defined clinical entity.
mesh_terms: D001934:Branchial Region / Q000033:anatomy & histology*; D001935:Branchioma / Q000196:embryology* / Q000209:etiology; D006258:Head and Neck Neoplasms / Q000196:embryology* / Q000209:etiology; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D010614:Pharynx / Q000002:abnormalities / Q000196:embryology*