Publications by authors named "Tarık Demır"

Immunotherapy can significantly improve efficacy of cancer treatments. For locally advanced stage III lung cancers, chemoimmunotherapy in the neoadjuvant setting can achieve complete pathological response in about 40% of cases. However, optimal cancer response in patients receiving immunotherapy is sometimes associated with potentially fatal bystander injury to lung and liver.

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Article Synopsis
  • Circulating tumor DNA (ctDNA) can help doctors detect and treat liver cancer called hepatocellular carcinoma (HCC) without having to do surgery or other invasive tests.!
  • A study looked at ctDNA from 44 HCC patients to see if it could predict how long they would live and how well they would respond to a treatment called nivolumab.!
  • The results showed that certain mutations in ctDNA were linked to shorter or longer survival times, suggesting ctDNA testing could help doctors make better treatment decisions for HCC patients in the future.!
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Background: Invasive mucinous adenocarcinoma (IMA) is a rare histological subtype of lung invasive adenocarcinoma with unique clinical, radiological, histopathological, and genomic characteristics. There have been limited studies on the effectiveness of systemic therapy for lung IMA, with conflicting results reported.

Methods: We retrospectively investigated the medical records of patients diagnosed with lung IMA.

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In the last decade, targeted therapies have shown rapid advancement in biliary tract cancer (BTC). Today, many targeted agents are available and under investigation for patients with BTC. More recently, immune checkpoint inhibitors (ICI) such as durvalumab and pembrolizumab in combination with gemcitabine plus cisplatin (gem/cis) have resulted in improved overall survival and progression-free survival in the first-line setting.

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The prognosis of breast cancer patients with brain metastasis is poor. It was aimed to define the clinicopathological features of breast cancer patients with brain metastases and to determine the risk factors and survival outcomes associated with brain metastasis. This is a single-center, retrospective, cross-sectional study.

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Background: Non-small cell lung cancer (NSCLC) is a leading cause of morbidity and mortality. Carboplatin and cisplatin based regimens are used in the treatment of NSCLC. The aim of the study was to find out whether there is a difference in white matter (WM) changes between two platinum-based chemotherapy agents using diffusion tensor imaging (DTI).

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Objective: To investigate the relationship between colon cancer (CC) subtypes defined by the status of tumor-infiltrating lymphocytes (TIL) and mismatch repair (MMR) combination with clinicopathological features and survival.

Study Design: Observational study.

Place And Duration Of Study: Department of Medical Oncology, Haydarpaşa Numune Research and Training Hospital, Istanbul, Turkey, from July 2010 to March 2020.

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The aim of this study was to investigate the predictive and prognostic value of PLR, and the relationship between PLR and tumor localization.A total of 229 patients with de-novo metastatic CRC were retrospectively analyzed. The cutoff value for PLR was defined by the receiver operating characteristic (ROC) curve analysis and threshold value of 196.

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Purpose: The purpose of this study was to investigate the prognostic value,and the effect of primary tumor location on targeted therapy selection in patients with metastatic colorectal cancer (mCRC).

Methods: A total of 201 patients with de novo mCRC who received first line treatment were retrospectively analyzed. Clinicopathological features, treatment outcomes, the primary tumor surgery, metastasectomies/local therapies and survivals were evaluated in terms of both RAS mutation status and primary tumor sidedness.

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A 21-year male presenting with left testicular mass and retroperitoneal lymphadenopathy underwent radical orchiectomy; and his pathological examination showed a mixed germ cell tumor composed of primitive neuroectodermal tumor mixed with mature teratoma. Six cycles of IE (ifosfamide, etoposide) and VAC (vincristine, doxorubicin, cyclophosphamide) chemotherapy were given after sperm preservation. He then underwent retroperitoneal lymph node dissection (RPLND).

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Objective: To evaluate the predictive significance of the duration of temozolomide (TMZ) in patients with glioblastoma multiforme (GBM) who were treated with bevacizumab (Beva) as second-line setting.

Study Design: Descriptive study.

Place And Duration Of Study: Bezmialem Vakif University School of Medicine Hospital, Istanbul, Turkey, from January 2014 to September 2020.

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Objectives: To determine the relationship between fear of falling (FOF) and upper extremity muscle strength.

Methods: This cross-sectional study included 112 hospitalized, mobile patients. Forty-seven (42%) were males and 65 (58%) were females, and the mean age was 72.

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Hepatocellular carcinoma (HCC) is a lethal malignancy with poor prognosis. More than 80% of patients are diagnosed at an advanced stage, and most patients with HCC also have liver cirrhosis that complicates cancer management. No targeted treatment options currently exist outside genomics-based clinical trials.

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Objective:  To evaluate the predictive significance of systemic inflammation markers (SIMs) in patients with glioblastoma multiforme (GBM), who were treated with bevacizumab (Beva).

Study Design: Descriptive study.

Place And Duration Of Study: The study was conducted at the Bezmialem Vakif University School of Medicine Hospital, Istanbul, Turkey, from January 2014 to September 2019.

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Purpose: In the tumor (T), node (N), metastasis (M) American Joint Committee on Cancer (AJCC), and Union for International Cancer Control (UICC) (8th edition) staging system, N stage is more prominent than T stage. Our study aimed to compare the lymph node status of T4 tumors in stage III colorectal cancer (CRC).

Methods: A total of 475 patients (209; 44% female and 266; 56% male) were included in the study.

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Unlabelled: ABSTRACT  Objective: To describe the clinical, pathological and survival characteristics of Turkish patients with gastroenteropancreatic neuroendocrine neoplasms (GEP-NENs).

Study Design: Descriptive study.

Place And Duration Of Study: Bezmialem Vakif University School of Medicine Hospital from April 2012 to September 2018.

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Objective: The essential treatment for patients with renal cell carcinoma is nephrectomy. As no lymph node dissection (LND) could be performed in the majority of these patients, healthy staging could not be carried out. In this study, we investigated the impact of LND during nephrectomy on patient survival.

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This letter to the editor presents possible limitations of the study reported by Bilen et al., which might have affected the reported results.

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Objective: M30 and M65 levels reflect tumor cell activity in patients with epithelial cancer. Cytokeratin 18 is one of the cell skeletal elements. M30 is a apoptotic marker of cytokeratin 18.

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Purpose: To assess the efficacy and safety of regorafenib versus rechallenge chemotherapy in previously treated mCRC patients in third-line setting.

Materials And Methods: The data of 104 patients diagnosed with mCRC enrolled from 2010 to 2017 in six oncology centers were analyzed. Tumor treatment options were obtained from follow-up and treatment files.

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Background: The aim of this study was to identify the possible relationship of 5-fluorouracil (5-FU)-related arterial vasoconstriction with urotensin-2 (UT-2), which has a high potential as an endogenic vasoconstrictor.

Methods: We assigned the patients to 1 of 3 groups. Patients in group 1 received a bolus of 5-FU, those in group 2 a continuous infusion (CI) of 5-FU, and those in group 3 no 5-FU, which was also a control group.

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Purpose: The prognosis of gallbladder cancer is poor. Lymph node metastasis and the stage are known to be the strongest prognostic factors for survival. The aim of this study was to determine the importance of complementary surgery and other prognostic factors for survival of operated gallbladder cancer.

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Objectives: To determine the relation among the risk of falls, geriatric assessment, and anthropometric measurements, including the mini mental state examination, geriatric depression scale, handgrip test, and key pinch test.

Methods: This prospective study included 89 residents hospitalized between May 2014 and September 2015 in the geriatric care unit of the Istanbul Balikli Rum Hospital, Istanbul, Turkey. Patients were followed-up for one year, and their falls were recorded.

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Objective: To evaluate the relationship between anthropometric measurements and Nursing Home-Acquired Pneumonia (NHAP) risk.

Methods: Consecutive patients of 65 years or elderly who were living in the Balikli Rum Hospital Nursing Homes were included in this prospective study. At the beginning of this study, the patients' anthropometrics values were measured.

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Introduction: Systemic lupus erythematosus (SLE) is a systemic autoimmune disease with a variety of clinical features. Cardiac involvement is present in more than half of the patients with SLE. Fragmentation of QRS (fQRS) is presumed marker of cardiovascular risk and has not been previously evaluated in SLE.

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