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The primary purpose of our work is to show that the vidian canal can be determined on CT imaging. The secondary goal is to establish the position and configuration of the vidian canal visualization. The CT imaging of vidian canals of 150 patients were examined in axial and coronal sections in 3 mm thickness made at 3 mm intervals. The varying course of the canal inside the bone, bone structure and diameter of the canal were investigated. In all cases, the canal was seen, and in 4 of the cases (1.3%) the canal was separated into two parts by a septum on its initial portion. In 36% of the cases it was embedded in the sphenoid corpus, partially protruded in 54% of the cases, and was connected to the bone with a stalk inside the sinus in 10% of the cases. The bony structure of the canal showed continuation in 68%, with 32% showing dehisans. The incidence of dehisans was 77% in the stalked cases and 45% in the protruded cases. It was determined that it is possible to evaluate the position and configuration of the vidian canal with CT imaging. This may be useful for diagnosing vidian nerve pathology and performing surgical intervention such as vidian neuroectomy and sinus surgery.

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Maxillary sinus hypoplasia (MSH) is classified into three types depending upon embryological development of the sinus and uncinate process. Type III MSH is characterized by a near-absence of the uncinate process and an almost absent cleft-like sinus. Bilateral maxillary sinus aplasia or severe hypoplasia with associated paranasal sinus abnormalities is extremely rare. Two cases with severe maxillary sinus hypoplasia/aplasia (one of them with other associated paranasal sinus abnormalities) are presented in this article. This extremely rare abnormality should be kept in mind to prevent misdiagnosis and possible complications during endoscopic sinus surgery.

Certain types of paranasal sinus variations create a susceptibility to sinusitis.

Objectives: Celiac Trunk (CT) is a vital artery and the first unmatched branch of the abdominal aorta, providing blood to upper abdominal structures, particularly the liver, stomach, and spleen. It is essential to know its anatomy in terms of pancreas, spleen, gallbladder, liver surgeries, and interventional radiological procedures such as chemoembolization. The aim of our study is to contribute to the literature with the measurements of distances between the diaphragmatic crus and vascular structures with their diameters, which have been studied insufficiently, and to detect the possible relationships between vascular variations and collateral branches. Methods: Imaging findings of 200 patients (114 males and 86 females), who underwent Multi-Section Computed Tomography examination with various indications in our center between June 2016 and July 2020, were retrospectively analyzed. The statistical relations between CT and Hepatic Artery variations, collateral formations, age, and gender were evaluated with the Spearman’s Rho Correlation Coefficient Test. Results: The distance between the crus of diaphragm and CT was 4–60 mm (mean 24.3 mm), the distance between CT and superior mesenteric artery (SMA) was 2.5–35 mm (mean 8.6 mm), CT diameter was 4.6–9.4 mm (mean 7.3 mm), and the main hepatic artery diameter was 2.4–5.8 mm (mean 4.1 mm). There was no correlation in our study between CT, Hepatic Artery variations, and their collaterals (r in range of −20,124–0.116, p>0.05). It can be said that in cases of the single accessory left hepatic artery originating from the left gastric artery, such as Michel’s Type V and Type VIII, collaterals between common hepatic artery and SMA were relatively more frequent (p=0.1). Conclusion: Our study contributed to the literature by measuring the distance between diaphragmatic crus-vascular structures, which has been little studied in the past. Frequencies of CT and Hepatic Artery variations that have been detected in our study are similar to the results of the previous studies with non-malignancy patient groups.

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Background The radiological and surgical anatomy of the frontal sinus should be well-known in all age groups to successfully manage frontal sinus diseases and reduce the risk of complications in sinus surgery. Purpose To define frontal sinus and frontal cells according to the International Frontal Sinus Anatomy Classification (IFAC) criteria in pediatrics and adults. Material and Methods A total of 320 frontal recess regions of 160 individuals (80 pediatric, 80 adults) who underwent a computed tomography (CT) scan of the paranasal sinus (PNS) were included in the study. Agger nasi cells, supra agger cells, supra agger frontal cells, suprabullar cells, suprabullar frontal cells, supraorbital ethmoid cells, and frontal septal cells were evaluated in the CT analysis. Results The incidence rates of the investigated cells were determined to be 93.1%, 41.9%, 60.0%, 76.3%, 58.5%, 18.8%, and 0% in the pediatric group, respectively, and 86.3%, 35.0%, 44.4%, 54.4%, 46.9%, 19.4%, and 3.4% in the adult group, respectively. Considering the unilateral and bilateral incidence of the cells, agger nasi cells were highly observed bilaterally in both the pediatric group (89.87%) and the adult group (86.48%). Conclusion Our study results show that IFAC can be used as a guide to increase the chance of surgical treatment in the pediatric and adult groups and that the prevalence of frontal cells can be determined radiologically and contributes to the generation of estimations of the prevalence of frontal cells.