It is generally believed that incomplete rupture of the buccopharyngeal membrane causes congenital nasopharyngeal stenosis, while failure of the buccopharyngeal membrane to rupture results in congenital nasopharyngeal atresia.

bubble_chart Clinical Manifestations

Manifested as symptoms of complete nasal obstruction in newborns, including stuffy nose, difficulty breathing, cyanosis, and worsening during feeding. Examination of the pharynx reveals a thin membrane connecting the posterior edge of the soft palate to the posterior pharyngeal wall, with a smooth surface and soft texture upon touch.

bubble_chart Diagnosis

No airflow is detected when cotton fibers are placed in front of the nostrils. After constricting the nasal mucosa with a vasoconstrictor, a fine catheter or probe inserted through the nasal cavity cannot pass into the pharynx. Methylene blue instilled into the nasal cavity does not reach the pharynx. Nasal iodized oil contrast imaging can determine the location of stenosis or atresia.

bubble_chart Treatment Measures

Surgical treatment. For thin membranous atresia, a metal dilator can be inserted through the nasal cavity to perforate the atretic membrane and enlarge the opening. Additionally, a laser surgical device can be used to incise the atretic membrane.