Objective: In this study, it was aimed to investigate the function of high-resolution computed tomography (HRCT) densitometry in the diagnosis of otosclerosis by performing densitometric measurements on the foci around the cochlea. Materials and Methods: The HRCT images of 0.5 mm thin-slice axial-sections obtained from 30 patients with otosclerosis, who had been surgically confirmed and performed computed tomography of the temporal bone before the surgery, and 30 patients, who had undergone cochlear implant surgery and had been identified as the control group were examined. Densitometric measurements obtained from 7 different points of the otic capsule were recorded as the mean Hounsfield unit (HU) for each patient. Results: When we compared the patient and the control groups, a statistically significant difference was found in densitometric measurements in 6 of the 7 different regions (p<0.05). There was no statistically significant difference only in the HU 4 region (p>0.05). There was also a statistically significant difference between these two groups in the mean HU value obtained by measurements performed in 7 regions (p<0.05). In addition, no significant difference was found between both ears in all regions in the densitometric measurements at 7 different points of the otic capsule between the operated and non-operated ears of these patients (p> 0.05). Moreover, a negative and significant relationship was found between the bone conduction hearing threshold and HU4, HU5 and mean HU values according to the result of the Spearman correlation test. Conclusion: In our study, it was found that the density around the otic capsule was lower in patients with otosclerosis compared to normal patients. In addition, it was found that there was no statistically significant difference in density between the ear that was surgically confirmed to have otosclerosis and the non-operated ear in patients with otosclerosis

Purpose Studying the effect of Mesna on middle ear otitis media and cholesteatoma induced by propylene glycol on an experimental animal model. Methods The study was designed to consist of sixteen Wistar albino rats, their right ears being the control group and left ears being the experiment group. %50 propylene glycol, gentamicinsulfate and physiologic salt water were applied to the right ear and %50 propylene glycol, gentamicinsulfate and %20 Mesna were administered to the left ear through intratympanic injections on days 1, 3, 8, 15 and 21. The rats were sacrificed 45 days after the first injection and underwent histopathological examination. Results It was seen that cholesteatoma and fibrosis were less common in the experiment group in microscopic evaluation. A statistically significant decrease was observed when the average and maximum thicknesses of the tympanic membranes and the minimum thicknesses of the tympanic bulla of the control group and the experiment group were compared. (p< 0.05) Conclusion In the experimental cholesteatoma model created in rats, no statistical significance was observed, indicating that Mesna, which was applied intratympanically, completely prevented the formation of cholesteatoma. However, it was found that the prevalence of cholesteatoma formation was microscopically less in the experimental group.

Purpose: Recent studies have shown a relationship between cancer and inflammatory response. The aim of this study is to compare NLR and PLR values, which are inflammatory parameters, in precancerous and cancerous lesions and to determine whether there is a parameter that can be used in the early diagnosis of laryngeal squamous cell carcinoma. Methods:174 patients who were benign as a result of pathology, 122 patients who were malignant, 39 patients who were premalignant (335 patients in total) and 117 normal individuals were included in the study. Data groups were divided into 4 groups as Benign Laryngeal Lesion(BLL), Precancerous Laryngeal Lesion(PLL), Malignant Laryngeal Lesion(MLL) and Control Group(CG). In addition, the PLL group was subdivided into Mild Dysplasia(MiD), Moderate Dysplasia(MoD) and Severe dysplasia-carcinoma in situ (SeD/CIS). NLR, PLR and other parameters were calculated. Results: NLR and PLR values were significantly different between the groups. (p = 0.000, p = 0.002) The mean NLR was higher in the MLL and PLL groups, and was lower in the BLL and control groups. The mean PLR was also higher in the MLL and PLL groups. When the groups were compared in pairs, there was a significant difference between BLL and MLL (p = 0.001) and MLL and CG.(p = 0.006) The PLL group was subdivided into MiD, MoD and SeD / CIS. There was a significant difference in NLR when CG and other subgroups were compared.(p = 0.027) Significant differences were found between CG and SeD when the groups were compared in pairs.(p = 0.007) There was no significant difference between the groups in terms of PLR and dysplasia.(P = 0.516) Conclusion: As revealed in this study, these rates were low in the CG and BLL groups and high in the MLL group, so they could be used as markers to differentiate malignant lesions.