Distal nasolacrimal duct showing the valve of Hasner.
Recognition of the location of the nasolacrimal duct opening is important to prevent its damage while performing an intranasal inferior meatal antrostomy or creating a window transantrally in the inferior meatal wall during a Caldwell-Luc procedure.
Section of Otolaryngology, Halifax Medical Center, Daytona Beach, FL, USA.
Joseph P
JP
Mirante
Dewey A
DA
Christmas
Eiji
E
Yanagisawa
D004724:Endoscopy; D006801:Humans; D008443:Maxillary Sinus / Q000601:surgery; D009301:Nasolacrimal Duct / Q000033:anatomy & histology*