Publications by authors named "Emre Ozoran"

Article Synopsis
  • The FLOT 4-AIO trial demonstrated that a docetaxel-based treatment was more effective than an epirubicin-based regimen for patients with locally advanced resectable gastric cancer, but many patients didn't complete the full treatment plan of eight cycles.
  • This study compared total neoadjuvant therapy (FLOT x8) with the standard approach (FLOT 4+4) to see which method improved treatment completion and tumor downstaging for patients with advanced gastric tumors prior to surgical removal.
  • Results showed that the FLOT x8 group had a significantly higher completion rate of 89.1% compared to 67.6% in the FLOT 4+4
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Introduction: Ileostomy, frequently created after colorectal resections, hinders the physiologic function of the colon and can lead to dehydration and acute kidney injury due to high stoma outputs. This study aimed to evaluate the effectiveness of preventive measures on ileostomy-induced dehydration and related readmissions in a high-volume unit.

Methods: In this prospective cohort study at a high-volume colorectal surgery department in Turkiye, the Prospective Ileostomy-induced Dehydration Prevention Bundle Project (PIDBP) was assessed from March 2021 to March 2022.

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Purpose: This study aims to adapt and validate the Cleveland Clinic Colorectal Cancer Quality of Life Questionnaire (CCF-CaQL) in Turkish, addressing the significant need for reliable, language-specific QoL measures for colorectal cancer (CRC) in Turkiye. This effort fills a critical gap in CRC patient care, enhancing both patient-provider communication and disease-specific QoL assessment.

Methods: The CCF-CaQL was translated into Turkish, verified for accuracy, and reviewed for clarity and relevance.

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Objectives: Laparoscopic totally extraperitoneal inguinal hernia repair (TEP) surgery technique includes three key steps: reaching the preperitoneal space, reducing hernias, and placement of mesh. However, reaching the preperitoneal space can be complicated in patients with previous lower abdominal surgeries. This study aimed to assess the feasibility of laparoscopic inguinal TEP in patients with previous prostatectomies.

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Objective: In this study, we aimed to compare long term oncological outcomes of upfront surgery versus neoadjuvant treatment in patients with locally advanced gastric cancer.

Methods: A total of 183 patients who were operated for gastric cancer were retrospectively analyzed. The patients received either standard gastrectomy or preoperative NACT + gastrectomy.

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Purpose: This study aimed to compare local regrowth rates after total neoadjuvant therapy (TNT) versus standard neoadjuvant chemoradiotherapy (SNCRT) in locally advanced rectal cancer (LARC) patients that were strictly selected and assessed with a multimodal approach. Secondary outcomes were 4-year disease-free (DFS) and overall survival (OS) rates.

Methods: Locally advanced rectal cancer patients without distant metastases treated at Koç Healthcare Group between January 2014 and January 2021 were included.

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Background: Anastomotic leakage is a major complication in colorectal surgery, resulting in significant morbidity and mortality rates. Despite substantial progress in surgical technique, anastomotic leakage rates remain stable. An early diagnosis of anastomotic leaks was proven to reduce adverse outcomes and improve survival.

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Introduction: There is a progressive shift from a younger population to an older population throughout the world. With the population age shift, surgeons will be more encountered with older patient profiles. We aim to determine age-related risk factors of pancreatic cancer surgery and the effect of patient age on outcomes after pancreatic surgery.

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Background: The dysfunctions in the metabolism of iron have an important role in many pathological conditions, ranging from disease with iron deposition to cancer. Studies on malignant diseases of the breast reported irregular expression in genes associated with iron metabolism. The variations are related to findings that have prognostic significance.

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Objectives: Prognostic importance of metastatic lymph nodes in pancreatic cancer is always garnered attention due to dismal prognosis, with some quantitative factors drawing attention for significantly predicting outcomes. Size is one of the easy approach morphological characteristics of the lymph node, and data for effect of largest metastatic lymph node (LMLN) size on survival outcomes are lacking in pancreatic cancer. We aim to evaluate the effect of LMLN size on the prognosis of patients with pancreatic ductal adenocarcinoma (PDAC).

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Colorectal cancer is the third most common cancer in Turkey. The current guidelines do not provide sufficient information to cover all aspects of the management of rectal cancer. Although treatment has been standardized in terms of the basic principles of neoadjuvant, surgical, and adjuvant therapy, uncertainties in the management of rectal cancer may lead to significant differences in clinical practice.

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Article Synopsis
  • The study looked at how the size and presence of certain veins affected the treatment response in patients with rectal cancer.
  • They used MRI scans to check for extramural venous invasion (EMVI) before and after treatment in 57 patients.
  • Results showed that patients who responded well to treatment had smaller and fewer EMVI compared to those who only had a partial response, suggesting size and number matter in evaluating treatment effectiveness.
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Background: Breast cancer is the most common malignancy in women. Genetic risk factors associated with breast cancer incidence have been identified.

Aims: This study is aimed at determining the association of XRCC3 Thr241Met (rs861539), XRCC4 G(-1394) T (rs6869366) DNA repair and BAX G(-248) A (rs4645878), and BCL2 C(-938) A (rs2279115) apoptotic gene polymorphisms with breast cancer.

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Inguinal and incisional hernias are the two most common types of hernias caused by abdominal wall weakness and defects in connective tissue. The structure of the extracellular matrix, mainly collagen and metalloproteinases (MMPs), and their regulators have been studied extensively and found to play a significant role in the pathophysiology of hernias. One of the regulators of MMPs, tissue inhibitor metalloproteinases (TIMPs), bind to MMPs and inhibit its activity significantly shifting the balance towards collagen synthesis rather than degradation.

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Objective: This study aims to investigate the efficacy and safety of minimally invasive surgery (MIS) in gastric cancer and to compare MIS versus open gastrectomy (OG) in terms of early mortality and morbidity, long-term oncological outcomes, and recurrence rates.

Methods: A total of 75 patients who underwent MIS or OG for gastric cancer at Koç University School of Medicine between December 2014 and December 2019 were retrospectively analyzed. Postoperative complications and disease-specific survival were compared between surgical approaches.

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Background: Oncologic outcomes after complete mesocolic excision (CME) in colon cancer are under investigation. The aim of our study was to compare CME and conventional colectomy (CC) in terms of pathological and oncological outcomes for right colon cancer and to evaluate the impact of lymph node metastasis around the vascular tie on survival.

Methods: Consecutive patients with right colon cancer who had CME or CC between January 2011 and August 2018 at two specialized centers in Turkey were included.

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Breast cancer is one of the most common types of cancer among women worldwide. The TMPRSS6 (Transmembrane Serine Protease 6) gene encodes matriptase-2, which plays an important role in iron hemostasis as the hepcidin regulator and may play a role in breast cancer susceptibility. In this study, we examined the expression levels of the TMPRSS6 gene in healthy tissues and tumor tissues of breast cancer patients; and the relationship between these levels and pathological findings.

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Purpose: Live surgical demonstrations are considered an effective educational tool providing a chance for trainees to observe a real-time decision-making process of expert surgeons. No data exists evaluating the impact of live surgical demonstrations on the outcomes of minimally invasive colorectal surgery. This study evaluates perioperative and short-term postoperative outcomes in patients undergoing minimally invasive colorectal surgery in the setting of live surgical demonstrations.

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Purpose: Cervical lymph node (LN) metastases in papillary thyroid cancer (PTC) are common in tumors especially that are larger than 1cm. Ipsilateral central neck dissection (CND) is usually preferred even in the absence of a palpable LN. This study aims to clarify the incidence and predictive factors for occult ipsilateral central LN metastasis in these patients, and the management of patients without clinical evidence of metastasis.

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To date, the single-incision laparoscopic surgery (SILS) technique has been applied to a wide range of general surgical procedures; however, there are still scant data and debates on adrenal procedures. The aim of this study was to compare surgical outcomes of single-incision versus laparoscopic multiport adrenalectomy. The patients were divided into 2 study groups on the basis of the surgical approach: SILS (group 1) and multiport laparoscopic surgery (group 2).

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A Morgagni's hernia is a congenital defect found in the anterior aspect of the diaphragm between the costal and the sternal portions of this muscle. This defect is also referred to as the space of Larrey. It has been reported that 70% of patients with Morgagni's hernia are female, 90% of the hernias are right-sided, and 92% of the hernias have hernia sacs.

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A number of nontraumatic acute abdomen can result in peritonitis leading to sepsis. In emergent conditions, various procedures like segmentary colectomy and/or subtotal colectomy with anastomosis, Hartmann's procedure, transverse colectomy, and/or expandable metallic stent (SEMS) placement can be performed, considering the status of the patient and the facilitaties of the institution. In our study, we examined the cases diagnosed as acute abdomen without the history of trauma, which had lead to a procedure requiring colostomy.

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