Retronasalis

Retronasalis is a term used in anatomical and medical contexts, primarily relating to the nasal cavity. It refers to the region located behind the nasal passages, specifically the posterior opening of the nasal cavity into the nasopharynx. This area is crucial for the passage of air from the nose into the throat and also plays a role in olfaction, the sense of smell.

The choanae are the paired posterior nasal openings that mark the boundary of the retronasalis region. These openings are bordered by the nasal septum medially and the vomer bone. The structures within or immediately adjacent to the retronasalis can be affected by various conditions. For example, inflammation or swelling in this area, often due to infections or allergies, can lead to nasal obstruction and difficulty breathing through the nose.

Surgical procedures in the nasal and pharyngeal regions may involve working within or around the retronasalis. Understanding the anatomy of this area is important for surgeons to navigate and treat conditions effectively. While not a disease itself, retronasalis describes a specific anatomical location, and its clinical significance arises from its involvement in nasal airflow, breathing, and the potential for pathological processes to occur there.