Publications by authors named "Sahin O"

Objectives: To investigate the potential utility of the C-reactive protein-to-albumin ratio (CAR) and the systemic immune-inflammatory index (SII) as a biomarker in distinguishing between BPPV and acute cerebellar infarction (ACI) due to posterior inferior cerebellar artery (PICA) involvement.

Methods: The data of 2545 patients registered in our hospital database between 2017 and 2024 with a diagnosis of vertigo were retrospectively analyzed and 102 patients with benign paroxysmal positional vertigo (BPPV) and 100 patients with ACI were included in the study. Mann-Whitney U test, Chi-square test, or Fisher's exact test were used to compare variables between the two groups.

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BACKGROUND Chiari malformation type 1 occurs when the cerebellar tonsils are pushed into the spinal canal, which can result in syringomyelia. This retrospective study from a single center evaluated outcomes in 89 patients with Chiari malformation type-I (CM-I) and syringomyelia treated with an arachnoid-preserving technique between 2016 and 2023. MATERIAL AND METHODS A retrospective analysis was conducted at a tertiary referral center, involving 88 adult patients and 1 adolescent patient aged 14 to 61 years, with diagnosis by MRI and treated for CM-I with syringomyelia between 2016 and 2023, using the arachnoid-preserving technique.

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Post-transcriptional gene regulation by non-coding small RNAs (sRNAs) is critical for colonization and survival of enteric pathogens, including the zoonotic pathogen . In this study, we utilized IA3902 (a representative isolate of the sheep abortion clone) and W7 (a highly motile variant of NCTC 11168, a human gastroenteritis strain) to further investigate regulation by sRNA CjNC110. Both motility and autoagglutination ability were confirmed to be phenotypes of conserved regulation by CjNC110.

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  • Cryptosporidium and Giardia are common protozoan parasites affecting the digestive systems of various animals, leading to economic losses in animal breeding and posing public health risks.
  • Recent studies identified numerous genotypes of these pathogens, prompting research into their prevalence in water buffaloes in Türkiye, where previous research was limited.
  • The study found Cryptosporidium spp. in 3.92% and Giardia duodenalis in 0.98% of water buffalo stool samples, with C. ryanae being the most prevalent species, showing high genetic similarity among samples.
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Purpose: The confluence of laser interstitial thermal therapy (LITT) with immunotherapeutic approaches represents a promising option for managing recurrent brain lesions. However, the potential synergy between these modalities is still unclear. This meta-analysis examines the literature to elucidate the adverse effects and overall survival associated with this combination in treating recurrent brain metastases and glioblastoma.

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Introduction: Endoscopic ultrasound-guided fine needle aspiration (EUS-FNA) is a highly sensitive and accurate method for identifying pancreatic neuroendocrine tumors (PanNETs). However, research on grading and assessing the Ki67 proliferation index in FNA samples is limited.

Methods: This study analyzed 335 EUS-FNA cases performed between 2016 and 2022, of which 12 cases of PanNET were further evaluated.

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Objectives: Status epilepticus (SE) is a severe neurological condition associated with a poor prognosis. Refractory status epilepticus (RSE) is a treatment-resistant form of SE with an even worse prognosis. The exact mechanisms underlying the development of RSE are not fully understood.

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Campylobacter jejuni, a major cause of foodborne zoonotic infections worldwide, shows a paradoxical ability to survive despite its susceptibility to environmental and food-processing stressors. This resilience is likely due to the bacterium entering a viable but non-culturable state, often within biofilms, or even initiating biofilm formation as a survival strategy. This study presents an innovative application of NanoLuc bioluminescence to accurately monitor the development of C.

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Rationale And Objectives: The study aimed to evaluate demographic and radiological characteristics of breast incidentalomas found on 18-fluorodeoxyglucose Positron Emission Tomography-Computed Tomography (F-FDG PET-CT) performed for extramammary indications.

Materials And Methods: A total of 12633 F-FDG PET-CT scans performed between January 1, 2018 and January 1, 2024, were retrospectively reviewed. Breast incidentalomas that had undergone breast imaging, tissue diagnosis, or at least 2-year radiological follow-up were included.

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  • This study investigated how the crista galli (CG) structure changes in children aged 1-18 as they grow older, using CT imaging from 180 subjects equally split by gender.
  • Key measurements of the CG's width, height, and length showed significant growth in height and length with age, while width remained stable.
  • Various morphological types were identified, with Type 2 being the most common, and the presence of pneumatized CGs was found only in older children, indicating that these structural changes occur primarily after early childhood.
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  • The RND superfamily of multidrug efflux systems is crucial for antibiotic resistance in gram-negative pathogens, specifically highlighting how the CmeABC system in a major enteric pathogen extrudes antibiotics.
  • A new variant, RE-CmeABC, has emerged in clinical isolates, showing enhanced resistance due to specific amino acid changes in RE-CmeB and a promoter mutation, though the exact molecular mechanisms for its improvements are still unclear.
  • RE-CmeABC is spreading globally among diverse strains, particularly associated with human infections, suggesting the variant's clinical significance, while evolutionary evidence hints at its origin and expansion driven by antibiotic selection pressure.
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  • The study aimed to assess the quality of information in Instagram posts about spine surgeries using specific hashtags.
  • A total of 105 posts were analyzed by two independent physicians, revealing that half were from physicians and half from patients, with the majority being photos.
  • The results showed that posts from physicians had significantly higher information quality compared to those from patients, but overall, Instagram was not deemed a reliable source for patient information.
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Despite recent treatment advances, non-small cell lung cancer (NSCLC) remains one of the leading causes of cancer-related deaths worldwide, and therefore it necessitates the exploration of new therapy options. One commonly shared feature of malignant cells is their ability to hijack metabolic pathways to confer survival or proliferation. In this study, we highlight the importance of the polyol pathway (PP) in NSCLC metabolism.

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  • The study explores how school-age children with celiac disease manage their condition, focusing on the roles of family, friends, and teachers in a school setting.
  • Researchers used in-depth interviews with 14 children and identified three key themes: Individual challenges, Institutional support, and Environmental factors that affect disease management.
  • The findings highlight emotional and practical difficulties children face, emphasizing the need for schools to support these students and the crucial role of school nurses in their health management.*
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  • This study investigates risk factors for all-cause mortality and major cardiovascular events in patients undergoing ambulatory blood pressure monitoring, which helps track blood pressure outside of clinical settings.! -
  • The research analyzed data from 1,291 patients, finding that survival rates improved with certain blood pressure patterns and age, while poorer outcomes were associated with smoking and specific blood pressure dips.! -
  • The study emphasizes the importance of diastolic blood pressure dipping and nighttime variability in predicting health outcomes, highlighting the need for personalized treatment approaches in hypertension management.!
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  • * The study focused on isolating a novel quinoline alkaloid, quinoline dione, from the methanol leaf extract of Edgew using techniques like TLC bioautography and X-ray crystallography.
  • * Quinoline dione demonstrated significant antibacterial activity and superior antibiofilm effects compared to the crude extract, suggesting its potential as an effective treatment against resistant bacteria.
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Invasive lobular breast cancer (ILBC) is characterized with low tracer uptake on 18 F-FDG PET images. ILBC metastasis to gastrointestinal tract is a rare clinic scenario. We present a case of ILBC who presented with gastric metastasis and diagnosed with 68 Ga-FAPI-46 PET/CT and 18 F-FDG PET/CT images.

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Radiolabeled fibroblast activation protein inhibitors (FAPIs) are a novel approach in cancer detection and treatment. Targeting fibroblast activation protein, extensively produced by cancer-associated fibroblasts, FAPI plays a key role in tumor development. Its advanced imaging capabilities offer clearer results in solid tumors compared with traditional methods, drawing significant interest in oncology.

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Cancer-associated macrophage-like cells (CAMLs) are rare, gigantic, and atypical circulating cells found exclusively in the peripheral blood of patients with solid cancers. Obesity-induced hypoxia attracts macrophages to the tumor microenvironment, where they contribute to establishing chronic inflammation, leading to cancer progression. We hypothesized that obese patients with advanced breast cancer may have CAML profiles different from those of nonobese patients, and these profiles may correlate with proinflammatory markers or other macrophage-related markers.

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Objective: To compare one-year anatomical and functional results of switching to an on-label intravitreal anti-vascular endothelial growth factor (anti-VEGF) agent (intravitreal ranibizumab [IVR] or aflibercept [IVA]) after treatment failure with three loading doses of off-label intravitreal bevacizumab (IVB), which is mandatory in the treatment of neovascular age-related macular degeneration (nAMD) to get reimbursement from Social Security Institution in Turkiye.

Methods: This comparative, real-life, retrospective cohort study included treatment-naïve nAMD patients treated starting with three loading doses of IVB, switched to three loading doses of IVR and IVA due to treatment failure after IVB loading, and followed up one year with a treat-and-extend (T&E) protocol with 2-week extension/shortening intervals. The primary outcomes were changes in best-corrected visual acuity (BCVA; logMAR) and central macular thickness (CMT, µm) one year after the switch, and the secondary outcomes were maximum treatment intervals, number of injections, and disease activity rates.

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  • * A study analyzed 2,379 CNS isolates from swine, identifying 29 serotypes, with serotypes 1 and 7 being the most common causes of CNS infections, accounting for 32% of submissions.
  • * Findings indicated that clinical signs alone do not define pathotypes, serotype diversity is greater than previously known, MALDI-TOF MS has a 7% false-positive rate, and virulence-associated genes are unreliable for identifying CNS disease isolates.
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Objectives: Brain imaging of regional metabolic changes in cancer patients can provide insights into cancer biology. We aimed to detect regional metabolic changes in the brains of untreated lung cancer patients without brain metastases using 2-deoxy-2-[18F]fluoroglucose PET/computed tomography.

Methods: The study included 44 lung cancer patients and 17 non-cancer patients as controls.

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Echinophora genus is represented by six species in Türkiye, including three endemics. The objective of this study was to ascertain the antioxidant, tyrosinase, and collagenase inhibitory activities and to analyse the volatile oil and extracts derived from E. chrysantha using GC/MS/SPME.

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Objectives:  Duplicate patient records can increase costs and medical errors. We assessed the association between demographic factors, comorbidities, health care usage, and duplicate electronic health records.

Methods:  We analyzed the association between duplicate patient records and multiple demographic variables (race, Hispanic ethnicity, sex, and age) as well as the Charlson Comorbidity Index (CCI), number of diagnoses, and number of health care encounters.

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