Objective: To investigate the frequency and characteristics of the mandibular accessory buccal foramen (ABF) with CT. Methods: A retrospective study was carried out using the CT records of 504 patients referred to the Erciyes University Medical School (Kayseri, Turkey) between 2007 and 2010. Presence, location, diameter, area and number of ABFs and their continuity with mandibular canal and distance to the mental foramen were evaluated using axial, sagittal and threedimensional CT images. Statistical analysis was performed using SPSSH v. 15 (SPSS Inc., Chicago, IL), and t-tests were used for statistical analysis. Results: 14 ABFs were observed in 10 (2%) of 504 patients. The frequency of ABFs was found to be 2.6% in males and 1% in females. The mean distance between the ABF and the mental foramen was 5.0 mm [standard deviation (SD) ¡2.48]. The mean long axis of the ABFs was 1.4 mm (SD ¡0.4) and the mean area of them was 1.5 mm 2 (SD ¡0.8). The mean area of the mental foramen on the side with the ABF was 4.1 mm 2 (SD ¡2.71). Conclusions: This study presents a relatively lower frequency of ABFs than that in the literature. These foramina could have more complex neurovascular structures than was previously thought. Thus, in special cases where a direct surgical exploration during the planned surgery is not indicated, CT or cone beam CT examination to determine the possible presence of ABFs may be indicated.

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Introduction: The disease caused by the novel coronavirus [COVID -19] is a vital public health problem that has now affected approximately 68,037,473 people and caused 1,552,802 deaths around the world We aimed to correlate the frequency of the lung involvement patterns, the segmental distribution of lung infiltration, and TLSS in COVID-19 pneumonia patients with and without splenomegaly. Material and Methods: This retrospective study included patients that were admitted to our hospital between March 11, 2020 and June 10 2020, and diagnosed with COVID-19 by PCR test with a throat and nasal swab. The thoracic and upper abdomen CTs and the clinical and demographic features of the patients were analyzed at the time of initial diagnosis. Results: Consolidation [group 1 18 [47%], group 2 69 [28.2%] P = 0017], crazy pavement pattern [15 [39.5%], 42 [17.1%] p = 0.001] pleural band formations [24 [63.2%], 87 [35.5%] p = 0.001] interlobular septal thickening [23 [60.5%], 79 [32.2%] ] p = 0.001] sequelae of secondary tuberculosis [4 [10.5%], 8 [3.3%] p = 0.039] were more frequent in the patient with splemomegaly. The total lung severity score was high in the group with splenomegaly. [7.32 ± 6.15, 3.69 ± 5.16 p = 0.001] Conclusion: Consolidation, interlobular septal thickening, tuberculosis sequela, pleural band, and crazy pavement patterns were frequent in the COVID-19 pneumonia patients with splenomegaly. The most frequently affected segment was the superior segment of the right lower lobe. TLSS was higher in the COVID-19 pneumonia patients with splenomegaly.