Duplication of the internal carotid artery and segmental aplasia of the vertebral arteries.

The internal carotid artery mainly supplies the brain. As the internal carotid artery contributes to the formation of the cerebral arterial circle, its variations are relevant in imaging, interventional radiology, and surgery. Knowledge of these variations is important for vascular anastomosis in free flap reconstruction and in arterial ligatures for haemostasis.

Nose sinus manometry in evaluating functional outcomes of anterior and posterior endoscopic dacryocystorhinostomy.

Objective: The aim of this study is to evaluate the effectiveness of anterior and posterior dacryorhinocystostomy (En-Dcr) by assessing the surgical outcome with a new objective technique, nose sinus manometry.

Materials And Methods: Thirty adult patients presenting nasolacrimal duct obstruction were enrolled in this study and randomly divided in two groups. In group A patients underwent anterior endonasal dacryorhinocystostomy, group B underwent the posterior approach.

Nasal cytology as a screening tool in formaldehyde-exposed workers.

Background: Workers in pathology and anatomy laboratories may be exposed to formaldehyde. An evaluation of the early effects of this substance is, therefore, paramount. This preliminary study was conducted to evaluate if nasal cytology could be used as a tool to detect changes in nasal mucosa in workers exposed to formaldehyde.