Browsing by Author "Metin, S"

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    Efficacy of fennel (Foeniculum vulgare) and anise (Pimpinella anisum) essential oils as anaesthesics in common carp (Cyprinus carpio L. 1758)
    Metin, S; Didinen, H; Yigit, NO; Eralp, H; Ozmen, O; Avsever, ML
    In this study, the anaesthetic effects of fennel and anise essential oils were investigated on common carp. Fish (10 +/- 0.45 g) were exposed to nine concentrations of essential oils (5, 10, 20, 50, 100, 200, 300, 400 and 500 mg L-1). Additionally, the histopathological effects on the fish tissues including gill, skin and hepatopancreas and physiological effects on some blood parameters (Na+, K+, Ca+2, Cl-, total plasma protein and glucose) of essential oils were investigated in carp. At the end of the experiment, fennel oil showed an anaesthetic effect at a concentration of 500 mg L-1 in carp (anaesthesia induction and recovery times were 308 and 472 s, respectively). Anise essential oil showed deep anaesthesia at a concentration of 100 mg L-1, but anaesthesia induction time was found to be very long (20 min). In addition, anise oil at concentrations above 100 mg L-1 caused 10% mortality in fish. Blood parameters except glucose level in both essential oils were unchanged during deep anaesthesia in carp. However, plasma glucose levels were found lower in fish anaesthetized with anise oil than control and fennel groups (P < 0.05). At the histopathological examination, no pathological findings were observed in any organ of fish in the fennel group. However, severe hyperemia and inflammatory cell infiltrations in gills, erosive lesions in the skin and slight inflammatory reactions in the skin were observed in the anise group. The present study demonstrated that fennel essential oil at 500 mg L-1 concentration can be used as an effective and safe anaesthetic in common carp, but anise essential oil is not suitable.
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    Evaluating the effect of histopathological parameters of prostate adenocarcinoma on prognosis in radical prostatectomy specimens
    Tercan, E; Erbatu, O; Üçer, O; Metin, S; Nese, N
    BACKGROUND: Over the past decade, significant updates have been made regarding the classification and grading of prostate adenocarcinoma in radical prostatectomy specimens, following decisions reached in international conferences and through impactful publications. These alterations are closely linked to patient prognosis. OBJECTIVES: Observe the incidence of these changes and their impact on patient prognosis. Additionally, investigate the relationship between histopathological and clinical parameters to assist in multidisciplinary treatment planning. DESIGN: Retrospective cohort study SETTING: Tertiary university hospital METHODS: Hematoxylin and eosin, along with immunohistochemistry stained sections, were reevaluated, and clinical information, including patient demographics, preoperative PSA levels, and patient follow-up were collected from patients who underwent radical prostatectomy at our center. SAMPLE SIZE: 182 patients. MAIN OUTCOME MEASURES: Biochemical recurrence. RESULTS: The study highlighted the negative prognostic effects of factors such as Gleason grade group, lymphovascular invasion, intraductal carcinoma, positive surgical margins, extraprostatic extension, pathological T stage, and seminal vesicle invasion. These factors are important determinants of recurrence-free survival in prostate adenocarcinoma patients. CONCLUSION: This study identified comedonecrosis and intraductal carcinoma as independent negative prognostic factors. A 3-mm cutoff for positive surgical margins was supported, while the current cutoff for extraprostatic extension may require reevaluation. The impact of cribriform pattern and ductal carcinoma appears to be influenced by the grade group. No independent relationship was found between the Gleason score/pattern on positive surgical margins or extraprostatic extension and prognosis. Further, large-scale studies with long-term follow-up are needed.