Publications by authors named "Atakan Sezer"

Aim: The aim of the study was to assess the role of Magee Equation 3 (MagEq3), IHC4 score, and HER2-low status in predicting "satisfactory response (SR)" to neoadjuvant chemotherapy (NAC) in HR+/HER2- breast cancer (BC) patients.

Methods: In a retrospective study, female patients of any age with T, N, M HR+/HER2- BC who received NAC and underwent adequate locoregional surgical treatment were included. Patients were grouped according to 2 outcomes: (a) overall response to NAC in breast and axilla by using residual cancer burden (RCB) criteria and (b) axillary downstaging after NAC by using N staging.

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Neonatal severe hyperparathyroidism (NSHPT) causes severe hypercalcaemia, metabolic bone disease, and potential neurodevelopmental deficits, all of which can be life-threatening. The use of calcimimetic agents can prevent or delay technically difficult parathyroidectomy in the newborn period. We present a 6-day-old male infant who presented with poor feeding, weight loss, and severe hypotonia.

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Aim: Demand for nipple- and skin- sparing mastectomy (NSM/SSM) with immediate breast reconstruction (BR) has increased at the same time as indications for post-mastectomy radiation therapy (PMRT) have broadened. The aim of the Oncoplastic Breast Consortium initiative was to address relevant questions arising with this clinically challenging scenario.

Methods: A large global panel of oncologic, oncoplastic and reconstructive breast surgeons, patient advocates and radiation oncologists developed recommendations for clinical practice in an iterative process based on the principles of Delphi methodology.

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Article Synopsis
  • The study focuses on breast surgeons' perspectives regarding the choice between mastectomy and breast-conserving surgery for women with breast cancer, employing multicriteria decision-making methods.
  • Using the Analytic Hierarchy Process (AHP), TOPSIS, and VIKOR methods, researchers created a decision-making model based on tumor-related, patient-related, and post-operative factors with nineteen sub-criteria.
  • Findings from an online survey of 39 breast surgeons indicated that post-operative process-related factors, particularly aesthetic concerns, are the most significant criteria influencing surgery choice, leading to breast-conserving surgery being favored over mastectomy.
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Background: Primary hyperparathyroidism (pHPT) caused by a single benign parathyroid adenoma is a common endocrine disorder that is affected by regional differences. Living in different geographical regions reveals differences in the laboratory results and pathological findings, but studies on this subject are not sufficient. The article focuses on biochemical and pathological effects of geographical differences in parathyroid adenoma.

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Purpose: The COVID-19 pandemic brought unprecedented conditions for overall health care systems by restricting resources for non-COVID-19 patients. As the burden of the disease escalates, routine elective surgeries are being cancelled. The aim of this paper was to provide a guideline for management of endocrine surgical disorders during a pandemic.

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Aim: Parathyroid surgery has witnessed a significant evolution with the introduction of more efficacious preoperative localization imaging techniques and the use of rapid intraoperative parathormone assays. Parathyroid surgery can now be performed with the minimum of invasion. Through the adaptation of the transoral endoscopic thyroidectomy vestibular approach (TOETVA), the technique has now been adopted for parathyroid surgery, known as the transoral endoscopic parathyroidectomy vestibular approach (TOEPVA).

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Objectives: Cancer care is excessively influenced by the COVID-19 outbreak for various reasons. One of the major concerns is the tendency for delayed surgical treatment of breast cancer patients. The outbreak has urged clinicians to find alternative treatments until surgery is deemed to be feasible and safe.

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Purpose: Pathogenic/likely pathogenic (P/LP) germline variations in BRCA1 and BRCA2 genes are responsible for the majority of hereditary breast and ovarian cancers. This study presents the BRCA1/BRCA2 sequencing and deletion duplication analyses results of of 493 participants (485 women, 8 men) selected based on the National Comprehensive Cancer Network (NCCN) guidelines.

Methods: Next generation sequencing (NGS) and multiplex ligation-dependent probe amplification methods (MLPA) were used to define germline BRCA1/BRCA2 positivity.

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Purpose: Breast cancer is the most frequent cancer in women, and there is a great variability in surgical practice for treating that cancer in different countries. The aims of this study were to analyze the effect of guidelines from the Turkish Federation of Breast Diseases Societies on academic institutions that have breast centers and to evaluate surgical practice in Turkey in 2018.

Patients And Methods: Between January and March 2019, a survey was sent to breast surgeons who were working in breast centers in academic institutions.

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Aim BRAF mutation inhibits many tumour suppressor genes, increases pro-angiogenic molecules and reduces radioactive iodine uptake of tumour in papillary thyroid cancer (PTC), giving it more aggressive clinical characteristics. In this study, we aimed to evaluate the effect of BRAF V600E mutation on the clinicopathological features in patients with PTC. Methods The laboratory and clinical findings of 256 PTC patients who were referred to our clinic between 2007 and 2017 were assessed.

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Introduction: Noninvasive follicular thyroid neoplasm with papillary-like nuclear features (NIFTP) is a newly defined entity accepted as a tumor precursor.

Objectives: We aimed to examine the features of patients diagnosed with follicular variant papillary thyroid carcinoma (FVPTC), which are classified as NIFTP in the recent classification. This study compares clinical, radiological, histopathological, and molecular featur es of NIFTP and FVPTC.

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Detection of thyroid carcinoma has been steadily increased in the past few decades. After the recognition of NIFTP, also gain importance to differentiate benign tumors (follicular adenoma) from follicular patterned variants of papillary thyroid carcinoma (invasive and infiltrative follicular variant papillary thyroid carcinoma), and low-risk lesions of thyroid (NIFTP). Follicular patterned proliferations of thyroid still persists as a battle for pathologists.

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Objectives/hypothesis: This multicenter study aimed to 1) evaluate early postoperative vocal fold function in relation to intraoperative amplitude recovery, and 2) determine optimal absolute and relative thresholds of intraoperative amplitude recovery heralding normal early postoperative vocal fold function, both after segmental type 1 and after global type 2 loss of signal (LOS).

Study Design: Prospective outcome study.

Methods: This study, encompassing nine surgical centers from four countries, correlated intraoperative amplitude recovery with early postoperative vocal fold function using receiver operating characteristic analysis.

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Background: The MF07-01 trial is a multicenter, phase III, randomized, controlled study comparing locoregional treatment (LRT) followed by systemic therapy (ST) with ST alone for treatment-naïve stage IV breast cancer (BC) patients.

Methods: At initial diagnosis, patients were randomized 1:1 to either the LRT or ST group. All the patients were given ST either immediately after randomization or after surgical resection of the intact primary tumor.

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Incidental papillary thyroid carcinomas (IPTCs) consist of a significant portion of increasing incidence in papillary thyroid carcinomas. This study investigated the clinicopathological features of IPTCs from different perspectives and by comparing nonincidental PTCs (NIPTCs) in patients who underwent total thyroidectomy and lymph node dissection. Basic results were as follows.

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Introduction: This study aimed to evaluate concurrently detected thyroid pathologies in the patients who underwent surgery for primary hyperparathyroidism (PHPT).

Materials And Methods: In this study, we retrospectively analyzed the files of the patients who underwent surgery for PHPT between 2012 and 2015. Pre- and post-operative laboratory examination results and preoperative radiological and nuclear medicine findings of the patients were retrospectively recorded.

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The Oncoplastic and Reconstructive Breast Surgery course was held in Izmir by the Izmir Breast Diseases Federation in collaboration with the Breast Diseases Federation of Turkey. The techniques of oncoplasty, the application details and experience in this subject were shared. In this text, the main topics and outcomes are briefly summarised.

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Lymphovascular invasion (LVI) is an important prognostic factor in various solid tumors, however, data on the association between LVI and thyroid carcinomas are limited. In this study, we evaluated the relationship between LVI and clinicopathological features of papillary thyroid carcinoma (PTC). Six hundred seventy-eight patients diagnosed with PTC between 2012 and 2015 were included into the study.

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Article Synopsis
  • - The study explored how geographical differences impact the clinical presentation and surgical outcomes of patients with primary hyperparathyroidism (pHPT) across three regions: Black Sea, Mediterranean, and Anatolia.
  • - Data from 694 patients across 23 centers indicated that the median age was 54, with 25% being asymptomatic; significant variations emerged in preoperative symptoms, serum calcium levels, and adenoma sizes depending on the region.
  • - Findings suggest that environmental factors related to different habitats influence the clinicopathological characteristics of pHPT patients, with South-East Anatolia showing all symptomatic patients, while Bulgaria had the largest adenoma sizes and highest calcium levels.
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Leptin and apelin are important adipocytokines involved in a variety of endocrine and paracrine functions. The aim of this study was to evaluate the effect of exogenous leptin and apelin preconditioning on hepatic ischemia reperfusion (I/R) injury in rats. Forty mice were assigned to four groups (n = 10): sham-operated control (sham), I/R injury, I/R + leptin (I/R + L), and I/R + apelin (I/R + A).

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The aim of this study was to determine the effect of everolimus and tacrolimus pretreatments on renal morphology and function in a rat ischemia reperfusion (I/R) model. Twenty-eight male Sprague-Dawley rats were randomly assigned to saline + sham operation, saline + I/R (IR), tacrolimus + I/R (TRL + I/R) and everolimus + I/R (ERL + I/R) groups. Saline and active treatments were administered intraperitoneally for seven consecutive days before the surgery.

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We aimed to investigate insulin receptor substrate-1 (IRS-1), insulin receptor substrate-2 (IRS-2), insulin-like growth factor binding protein-3 (IGFBP-3) genotypes, which are thought to be involved in the pathogenesis of many solid tumors and have thus far not been studied in patients with differentiated thyroid cancer (DTC). The study consisted of 93 patients diagnosed with DTC (79 females, 14 males) and 111 healthy control subjects (63 females, 48 males). The anthropometric measurements, lipid profiles, thyroid function tests and homeostatic model assessment (HOMA) as an indicator of insulin resistance (IR) of all patients were recorded.

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