Rhinology and Sinus Disease
Core concepts
Understand the anatomy of the ostiomeatal complex, the drainage pathways of each sinus, and the blood supply of the nasal septum (Kiesselbach plexus and the sphenopalatine artery). Know the physiology of mucociliary clearance and the role of nitric oxide in sinus ventilation. Be able to classify rhinosinusitis by duration (acute, recurrent, chronic) and know when imaging is indicated. Understand the difference between allergic and non-allergic rhinitis and the role of skin-prick versus serum-specific IgE testing.
Traps
Questions often test the maxillary sinus drainage: it drains via the middle meatus, not the inferior meatus, and its ostium is superiorly located, which impairs gravity drainage. Another trap is confusing the sphenoid sinus relationship to the optic nerve and internal carotid artery, which matters in endoscopic surgery. Do not assume all nasal polyps are allergic; distinguish inflammatory polyps from inverted papilloma (unilateral, fleshy, may erode bone). Epistaxis questions often test the sphenopalatine artery as the target in posterior bleeding.
Worked rule
For a patient with unilateral nasal obstruction and epistaxis, think of a unilateral lesion such as inverted papilloma or malignancy until proven otherwise, and avoid treating it as simple rhinitis.