The blood supply to Little's area (Kiesselbach's plexus) on the anterior nasal septum is a confluence of all EXCEPT:

• A Anterior ethmoidal artery (branch of ophthalmic artery)
• B Sphenopalatine artery (branch of maxillary artery)
• C Greater palatine artery (branch of maxillary artery)
• D Posterior ethmoidal artery (branch of ophthalmic artery) ✓

Explanation

Kiesselbach's plexus receives contributions from: (1) the anterior ethmoidal artery (ophthalmic/ICA territory), (2) the posterior nasal branches of the sphenopalatine artery (ECA territory), (3) the greater palatine artery (ECA territory), and (4) the septal branch of the superior labial artery (ECA territory via facial artery). The posterior ethmoidal artery primarily supplies the posterior superior nasal septum and is NOT a major contributor to Kiesselbach's plexus; it mainly supplies the olfactory region and posterior superior septum.

Reference: Dhingra Diseases of Ear, Nose and Throat, 7th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.