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    Investigation of thermal damage in bone drilling: Hybrid processing method and pathological evaluation of existing methods
    (Elsevier, 2022) Can, Murat; Koluacik, Serdar; Bahce, Erkan; Gokce, Hasan; Tecellioglu, Fahriye Secil
    In this study, a hybrid processing method using saline and cryogen cooler is proposed to keep the temperature below the threshold level during bone drilling. Drilling experiments were performed dry, saline, cryogen and, hybrid (saline + cryogen). At the end of the experiment, tool wear, the effect of the methods on the temperature, and the pathological evaluation of the thermal damage were investigated. The advantageous methods for bone drilling were proposed as a hybrid, saline, cryogenic and dry machining, respectively. In addition, it was observed that when cryogen was applied directly to the cutting area, it caused damage to the cell wall structure by the formation of ice crystals in the bone matrix. For this reason, it was recommended to be applied to the body of the cutting tool and it was found that cryogen flow rate has a significant effect on tool wear.
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    Mmp-9 and Fascin-1 Expression in Endometrioid-Type Endometrial Carcinoma and Their Prognostic Value
    (Springer India, 2021) Tecellioglu, Fahriye Secil; Akpolat, Nusret; Sahin, Nurhan
    Backgrounds Matrix metalloproteinases (MMP) and fascin-1 play roles in epithelial-mesenchymal transition and tumour invasion. Aims This study was performed to investigate the relationships of fascin-1 and MMP-9 expression with prognostic parameters in endometrioid-type endometrial carcinoma (EEC). Methods A total of 100 cases of EEC were included in the study. Tissues were stained with antibodies against fascin-1 and MMP-9. The relationships between the immunohistochemical findings and clinicopathological prognostic parameters of EEC were examined. Results Tumour diameter was significantly related to lymphovascular invasion, FIGO stage and FIGO grade (p < 0.05). A tumour size > 2 cm was associated with a poor prognosis. The staining score for fascin-1 was <= 5 in 81 cases and > 5 in 19 cases (p > 0.05), and that for MMP-9 was <= 5 in 39 cases and > 5 in 61 cases (p > 0.05). Neither fascin-1 nor MMP-9 expression was significantly related to any of the clinicopathological parameters examined. Conclusion There were no significant relationships of fascin-1 and MMP-9 expression with the clinicopathological parameters of EEC. The results of this study suggested that these molecules do not contribute to the clinical behaviour of EECs. A tumour size > 2 cm is associated with a poor prognosis in EEC patients. To verify these results, more studies are needed with larger patient groups.
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    Red and White Thrombus Characteristics in Patients Undergoing Carotid Endarterectomy
    (Elsevier, 2021) Tosun, Hatice; Kamisli, Suat; Tecellioglu, Mehmet; Alan, Saadet; Tecellioglu, Fahriye Secil; Oztanir, Mustafa Namik; Kablan, Yuksel
    Objective: The study aimed to compare the characteristics of red and white thrombi in patients undergoing carotid endarterectomy. Material and Methods: The study was conducted in 81 patients with ischemic stroke who underwent carotid endarterectomy for carotid artery stenosis. Carotid plaques were graded by two pathologists. Thrombus materials were divided into two groups: white and red. The parameters of assessment were plaque rupture, lipid core, fibrous cap thickness, inflammation, intraplaque hemorrhage, calcification, necrotic core, and neovascularization. Normally distributed data were evaluated using Mann-Whitney U and Chi-squared tests. Results: The ratio of white and red thrombus was 19.8% and 80.2%, respectively. Lipid core, plaque rupture, necrotic core, neovascularization, intraplaque hemorrhage, obstruction, and inflammation were observed more in red thrombus, which were statistically significant. Calcification and fibrous cap thickness were not statistically significant in the two groups. Moreover, intimal smooth muscle cells were present in all thrombus types. Conclusion: In our study, we found that red thrombi had more unstable characteristics than white thrombi. Thus, the risk for ischemic cerebrovascular events is more in red thrombi. However, this finding cannot be generalized due to the small number of patients in this study. Therefore, studies involving more patients are needed.
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    Review of the literature on Alport syndrome: A rare cause of nephrotic syndrome
    (2021) Tecellioglu, Fahriye Secil; Akpolat, Nusret; Tabel, Yılmaz; Gül, Mehmet
    Alport syndrome is a type IV collagen synthesis disorder characterized by hereditary progressive glomerular disease resulting from glomerular basement membrane injury, often accompanied by hearing loss and ocular defects. The most common form is X-linked Alport syndrome, which accounts for 80% of all cases. Although women mainly present with mild urinary symptoms, end-stage renal disease onsets at an early age in men. An 11-year-old girl was admitted to our hospital with mild bifissure oedema for the last 3 months. This study discusses the clinical, morphological and transmission electron microscopic findings of a rare case of Alport syndrome in the context of the wider literature.