The Kiesselbach's plexus (Little's area) is the most common site for anterior epistaxis. Which of the following arteries does NOT contribute to the anastomosis in Kiesselbach's plexus?

• A Anterior ethmoidal artery
• B Posterior ethmoidal artery ✓
• C Septal branch of superior labial artery
• D Greater palatine artery

Explanation

Kiesselbach's plexus at Little's area (anteroinferior nasal septum) receives contributions from: (1) anterior ethmoidal artery (branch of ophthalmic artery/internal carotid); (2) septal branch of the superior labial artery (branch of facial artery/external carotid); (3) greater palatine artery (branch of maxillary artery/external carotid); and (4) nasopalatine artery (also maxillary artery). The posterior ethmoidal artery supplies the posterior superior nasal septum and lateral wall; it contributes to Woodruff's plexus in the posterior nasal cavity (site of posterior epistaxis), not Kiesselbach's plexus. Distinguishing arterial contributions is critical for ligating the correct vessel in refractory epistaxis.

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.