1. Definition Choanal atresia is a congenital failure of the posterior nasal aperture (choana) to open, resulting in complete or partial obstruction between: Nasal cavity anteriorly Nasopharynx posteriorly It may involve: Bone Membrane A combination of both Because newborns are …
1. Overview – Congenital Lesions of the External Nose Congenital anomalies of the external nose arise from disruption of embryological development between the 4th and 10th weeks of intrauterine life. These defects may involve: Skin Cartilage Bone Nasal cavity Nasal …
Approach To ENT Nose & Sinus History Taking General Principles History must be structured, symptom-directed, and anatomically correlated. Each symptom should be explored with: Duration Mode of onset Progression Aggravating/relieving factors Laterality Associated symptoms ENT history often reveals the diagnosis …
Embryology Of The Nose Origin Of Nasal Structures Begins around 4th week of intrauterine life Arises from frontonasal prominence Nasal placodes develop on lateral aspects of frontonasal prominence Nasal Placode Development Invaginates to form nasal pits Nasal pits deepen → …