Publications by authors named "Yuksel Altuntas"

Purpose: Bilateral inferior petrosal sinus sampling (BIPSS) is the gold standard for localizing ACTH-dependent Cushing's syndrome (CS). While corticotropin-releasing hormone (CRH) was initially used for stimulation, desmopressin has become a common alternative. This research evaluates desmopressin's effectiveness in lateralizing Cushing's disease (CD) during BIPSS compared to CRH stimulation.

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Objectives: To evaluate the patients with mild autonomous cortisol secretion (MACS) by means of choroidal thickness (CT) and also investigate whether CT may be a diagnostic tool in the management of MACS or not.

Methods: Twenty-seven patients with MACS and 25 age-sex-matched healthy controls were enrolled in this cross-sectional comparative study. All the participants underwent CT measurement by using Spectralis optical coherence tomography (Heidelberg Engineering, Heidelberg, Germany) with enhanced deep imaging mode at the subfoveal, 500-1000-1500 µm nasal and 500-1000-1500 µm temporal to the foveola.

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Objectives: The purpose of our study was to investigate the role of different magnetic resonance imaging (MRI) parameters in the characterization of adrenal masses.

Methods: A total of 150 patients who presented with 186 adrenal tumors were retrospectively evaluated in this study. Final patient cohort consisted of 17 pheochromocytomas, 3 adrenocortical carcinomas, 24 metastases, 31 lipid-poor adenomas and 111 lipid-rich adenomas.

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Background: The association between the glycaemic index and the glycaemic load with type 2 diabetes incidence is controversial. We aimed to evaluate this association in an international cohort with diverse glycaemic index and glycaemic load diets.

Methods: The PURE study is a prospective cohort study of 127 594 adults aged 35-70 years from 20 high-income, middle-income, and low-income countries.

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Article Synopsis
  • - This study aimed to identify factors affecting disease-free survival (DFS) in patients with medullary thyroid carcinoma (MTC), as previous research in this area has been limited.
  • - Researchers analyzed data from 257 patients, finding that 51% had persistent/recurrent disease while 49% had no evidence of disease at follow-up, with various factors like age, metastasis, and initial response influencing DFS outcomes.
  • - The key finding was that the lack of an excellent response after initial treatment is the strongest predictor of worse DFS, highlighting the need for diligent follow-up even in patients who initially respond well.
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The presence of insulin resistance (IR) in patients with type 1 diabetes mellitus (T1DM) is a significant indicator of all chronic diabetic complications, independent of other risk factors. The estimated glucose disposal rate (eGDR) is a practical method that can be easily used in daily practice to determine IR. This study aimed to determine the cutoff values for two eGDR methods and compare their diagnostic value for determining IR in adult T1DM patients with metabolic syndrome (MetS).

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Objective: A significant problem that compels clinicians in the conventional treatment of hypoparathyroidism is patients' non-adherence to treatment. This study aimed to evaluate the effects of adequate Ca intake with dietary recommendations among hypoparathyroidism patients who persistently use Ca supplementation irregularly on plasma Ca and phosphate levels.

Methods: This prospective, randomized, controlled study was conducted on patients diagnosed with chronic hypoparathyroidism who persistently interrupt Ca supplementation therapy and therefore have a hypocalcemic course.

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Objective: Hirsutism affects 5-15% of women of reproductive age. Health-related quality of life (HQOL) is a multidimensional assessment of well-being that considers the physical, social, and emotional aspects associated with a specific disease. The aim of this study is to evaluate HQOL in patients diagnosed with idiopathic hirsutism (IH) and compare it with patients diagnosed with polycystic ovary syndrome (PCOS).

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Objectives: Chronic hypercortisolism causes diverse alterations in the immune system and inflammatory disruptions. Serum inflammation-based scores (SIBS) are indicators of systemic inflammatory status. This study aims to determine the role of SIBS in the diagnosis and evaluation of remission in patients with Cushing's disease (CD).

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Objectives: Despite the presumed overdiagnosis of papillary thyroid microcarcinoma (PTMC) which has resulted in a new trend toward less-extensive surgery and a preference for active surveillance, the impact of microscopic extrathyroidal extension (mETE) on the clinical outcomes of PTMC is still controversial. This study assessed the impact of mETE on the clinical outcomes of patients with classic subtype PTMC.

Methods: The data of consecutive patients who underwent thyroidectomy and were histopathologically diagnosed as classic subtype PTMC were analyzed.

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Background: The risk of cardiovascular disease is correlated with the frequency and control of associated risk factors in diabetes mellitus and may vary according to country. We evaluated risk factors for cardiovascular disease, cardiovascular events, and the use of preventive medications in patients with diabetes mellitus using the Prospective Urban and Rural Epidemiological Türkiye cohort.

Methods: Patients with diabetes mellitus versus without diabetes mellitus were compared for risk factors, cardioprotective drugs (angiotensin-converting enzyme inhibitors or angiotensin-II receptor antagonists, statins, and antiplatelets), and cardiovascular events.

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Background: Higher intake of ultra-processed foods (UPFs) has been associated with increased risk of CVD and mortality in observational studies from Western countries but data from non-Western countries are limited.

Objectives: We aimed to assess the association between consumption of UPFs and risk of mortality and major CVD in a cohort from multiple world regions.

Design: This analysis includes 138,076 participants without a history of CVD between the ages of 35 and 70 y living on 5 continents, with a median follow-up of 10.

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Histologically aggressive micropapillary thyroid carcinomas (PTMC) subtypes are thought to be associated with an aggressive clinical course. However, evidence for unfavorable clinical outcomes in patients with aggressive PTMC subtypes is not clear. In this study, we intended to determine the difference in clinical outcomes between patients with aggressive and non-aggressive PTMC subtypes.

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Urbanization may influence physical activity (PA) levels, although little evidence is available for low- and middle- income countries where urbanization is occurring fastest. We evaluated associations between urbanization and total PA, as well as work-, leisure-, home-, and transport-specific PA, for 138,206 adults living in 698 communities across 22 countries within the Prospective Urban and Rural Epidemiology (PURE) study. The 1-week long-form International PA Questionnaire was administered at baseline (2003-2015).

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Objectives: Recent studies have revealed an association between dipeptidyl peptidase 4 inhibitors (DPP4i) and development of bullous pemphigoid (BP). The main aim of our study is to evaluate the association between DPP4i treatment and BP development. The secondary endpoints were to evaluate clinical characteristics and biochemical parameters of the DPP4i associated BP cases and determine the differences of DPP4i associated BP disease than non-DPP4i associated BP cases.

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Objectives: Our aim is to verify the prevalence of metabolic syndrome (MetS) in Paget's disease of bone (PDB) and to reveal the relationship between MetS and bone alkaline phosphatase (ALP) levels.

Methods: Twenty-three patients with PDB and 30 healthy subjects matched with age, sex, and body mass index (BMI) were recruited from the outpatient clinics of endocrinology. The ınternational diabetes federation -2006 MetS criteria were used for the evaluation of all participants.

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Article Synopsis
  • The study aimed to determine if dipeptidyl peptidase inhibitors (DPP-4i) influenced disease severity, hospital death rate, and mortality after 3 months in type 2 diabetes patients with COVID-19.
  • It analyzed data from 217 hospitalized T2DM patients, comparing those on DPP-4i with those not on it regarding hospitalization duration, need for additional respiratory support, and mortality rates.
  • Findings showed no significant differences in hospitalization length, need for mechanical assistance, or mortality rates between the two groups, indicating that DPP-4i usage had no impact on COVID-19 outcomes for T2DM patients.
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Unlabelled: Backgorund and aim: There are many studies on the effects of Diabetes Mellitus on the clinical course in COVID-19 patients. Factors that increase the risk of contracting COVID-19 disease and increase disease progression have been caused, and diabetes mellitus is one of them. We aimed to evaluate the incidence of Diabetes Mellitus in patients treated in the intensive care unit in respiratory failure due to COVID-19 pneumonia, and the effect of Diabetes Mellitus on the length of stay in intensive care and mortality.

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Objectives: Proposals for scientific studies must have an original hypothesis and the appropriate design and methodology to test the premise.

Methods: This study is an evaluation of the suitability of applications submitted to a local ethics committee (EC) and the rate of publication of that research.

Results: A total of 899 files submitted for EC approval were retrospectively assessed.

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Objective: The purpose was to compare the results of the RT-PCR test, with the findings of Chest CT and to determine the features of CT for the diagnosis of COVID-19 and how to approach RT-PCR negative patients.

Material Method: Chest CT findings of 569 COVID-19 diagnosed patients, followed up at the pandemic wards between March and June 2020 were retrospectively examined. Patients were grouped according to RT-PCR results, gender, and age.

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Aim: We aimed to investigate the retinal layers and macular capillary structure using optical coherence tomography angiography (OCTA) with acromegaly patients and determine the relationship between OCTA parameters and disease duration, Growth hormone (GH) and Insuline growth factor (IGF - 1) levels.

Patients And Method: Twenty-two patients with acromegaly who were followed up in the endocrinology outpatient clinic of Sisli Hamidiye Etfal Health Training and Research Hospital, were recruited into the study. Healthy control group was consisted of 22 age and gender matched subjects.

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Objective: Although the age at diagnosis has been suggested as a major determinant of disease-specific survival in the recent TNM staging system, it is not included in the recent American Thyroid Association (ATA) guidelines to estimate the risk of recurrence. Nevertheless, the effect of sex on differentiated thyroid carcinoma (DTC) recurrence is controversial. Therefore, this multicenter study was conducted to assess whether age at diagnosis and sex can improve the performance of the ATA 3-tiered risk stratification system in patients with DTC with at least 5 years of follow-up.

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Objectives: The objective of the study was to evaluate the human epidermal growth factor receptor 2 (HER2) overexpression, clinicopathological features, and factors affecting survival in patients with gastric cancer.

Methods: The study is a retrospective study conducted with 128 cases of gastric cancer who were admitted to Şişli Hamidiye Etfal Training and Research Hospital between 2005 and 2012. Patients' demographic characteristics, performance score, tumor localization, information about surgery, HER2 measurements, histopathological characteristics, stage, treatment features, metastasis sites, and overall survival time were obtained from medical records.

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Objectives: Coronavirus disease 2019 (COVID-19) have different clinical presentations in children. Most symptomatic children with suspicion of COVID-19 have fever and respiratory symptoms. In this retrospective study, we aimed to describe demographic features, clinical characteristics, and outcomes of confirmed and probable COVID-19 patients admitted to our pediatric emergency department (ED).

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Objective: To evaluate the relation between intake of ultra-processed food and risk of inflammatory bowel disease (IBD).

Design: Prospective cohort study.

Setting: 21 low, middle, and high income countries across seven geographical regions (Europe and North America, South America, Africa, Middle East, south Asia, South East Asia, and China).

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