Özet:

Purpose: Sfenoid sinus (SS) is placed in the sfenoid bone in the depths of the scalp, surrounded by a large number of vital nerve and vascular structures, the most difficult to reach paranasal sinus (PNS). Radiological assessment of the sfenoid sinus and related neurovascular structures is inevitable before surgery. The aim of this study is to analyze the anatomical variations associated with the SS and surrounding neurovascular structures using multi-cutting computer tomography (BT) and to contribute to literature by comparing the obtained information with similar studies. The study included a total of 100 facts (50 women, 50 men) caused by paranasal sinus BT due to various rhinological diseases in the last year. SS variations were considered bone abnormalities and soft tissue pathologies in BT. The findings: Sfenoid was a common finding in the study of variations of neurovascular structures around the sinus. Variations related to the Vidian channel were the most common in our study, found in 73% of the cases; with 55% the optical nerve, with 53% the maxile nerve, with 52% the internal carotid artery follows the bone channel variations. In 59% of our cases, pterigoid plate, in 41% anterior clinoid, in 13% sfenoid large wing pneumatization was detected; in 15% onodial cells, in 46% multiple septation, in 20% mucous thickness, in 0.4% polyps and in 0.3% retention cysts were detected. The structure of the sfenoid sinus is quite variable; PNS is important in the detection of anatomical variations before synonazal and transfenoidal surgeons and in the prevention of possible complications during surgery. In our study, the variations of SS were found higher than previous studies. It may be caused by differences in ethnic groups, IT drawing technique or anatomical assessment criteria.

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