Anatomical features of the opening of the nasolacrimal duct and the lacrimal fold (Hasner's valve) for intranasal surgery: a cadaveric study.

The location and size of the opening of the nasolacrimal duct and the lacrimal fold (Hasner's valve) are variable. These features have clinical importance in nasal surgery because of the difficulty in determining their location. The aim of this study was to demonstrate the anatomical features of the opening of the nasolacrimal duct and the lacrimal fold and to discuss the importance of such knowledge in minimizing the risk of injury at surgery.

Anatomical analysis of the prevalence of agger nasi cell in the Turkish population.

Objectives: The aim of this study is to give information about the anatomy of agger nasi cell for the surgery of the nasal cavity lateral wall.

Material And Methods: Twenty mid-sagittal head sections were obtained at random from formalin fixed male Turkish cadavers (12 left sides, 8 right sides). The presence and anatomical structure of agger nasi cell were investigated under operating microscope.

The incidence and anatomical features of the McKenzie branch: a cadaver study.

Aim: The aim of this study was to demonstrate the morphological characteristics of the connections between the spinal accessory nerve and the anterior root of the first cervical nerve (C1) which is also called the McKenzie branch.

Material And Methods: The cranial cervical regions of 49 specimens from 27 human cadavers were used for this study under an operating microscope. The topographical relationship of the accessory nerve to the anterior roots of C1 were studied.

Connections between the accessory nerve and the posterior root of the first cervical nerve.

The aim of this study was to demonstrate the incidence of absence of the posterior root of the first cervical nerve, and the relation between the accessory nerve and the posterior root of the first cervical nerve in Turkish population. Dissections of the accessory nerve and the posterior root of the first cervical nerve were performed in 49 specimens from 27 formalin fixed cadavers (25 male and 2 female). The type of the connections between the accessory nerve and the posterior root of the first cervical nerve was classified into four types.