Age-related macular degeneration
Retinopathy of prematurity
Eye conditions: Inflammation, infections and trauma: Pathology review
Eye conditions: Refractive errors, lens disorders and glaucoma: Pathology review
Eye conditions: Retinal disorders: Pathology review
Nasal, oral and pharyngeal diseases: Pathology review
Parathyroid disorders and calcium imbalance: Pathology review
Thyroid nodules and thyroid cancer: Pathology review
Vertigo: Pathology review
0 / 6 complete
Choanal atresia is a congenital disorder in which a membranous tissue blocks the back of the nose (also called the choana) due to failure of recanalization during fetal development. Choanal atresia can be unilateral or bilateral, depending on whether one or both nasal passages are obstructed. This prevents the air from entering the nasal passages, resulting in symptoms like difficulty breathing and a constantly stuffy nose.
Copyright © 2023 Elsevier, its licensors, and contributors. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
Cookies are used by this site.
USMLE® is a joint program of the Federation of State Medical Boards (FSMB) and the National Board of Medical Examiners (NBME). COMLEX-USA® is a registered trademark of The National Board of Osteopathic Medical Examiners, Inc. NCLEX-RN® is a registered trademark of the National Council of State Boards of Nursing, Inc. Test names and other trademarks are the property of the respective trademark holders. None of the trademark holders are endorsed by nor affiliated with Osmosis or this website.