Publications by authors named "Ekenel M"

Renal cell carcinoma is the 10th most common type of cancer, accounting for 3.7% of all cancers. Our study examines patients with metastatic renal cell carcinoma who received Axitinib or Nivolumab as second-line treatment.

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Primary central nervous system tumors rank 8 among other cancers in patients over 40 years of age. Glioblastoma is the most common primary central nervous system malignancy, accounting for 48 percent of the cases. The present study evaluates the effect of bevacizumab on the disease course in patients who received bevacizumab therapy due to primary central nervous system tumors in our clinic.

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This is the report on our clinic's 15 years of experience (2004-2018) on nasopharyngeal carcinoma (NPC), treated with induction chemotherapy (IC) and subsequent concomitant chemoradiotherapy (CCRT), comprising population characteristics and treatment outcomes of 203 patients with non-metastatic NPC. IC comprised docetaxel (75 mg/m) and cisplatin (75 mg/m) combination (TP). Concurrent cisplatin (P) was applied either weekly (40 mg/m, 32 cases) or every-3-week (100 mg/m, 171 cases).

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Objective: This study was performed to examine the disease course in geriatric patients with soft tissue sarcoma and determine the risk factors for mortality.

Methods: We retrospectively analyzed patients who were treated at Istanbul University Oncology Institute from January 2000 to August 2021.

Results: Eighty patients were included in the study.

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Rupture of a metastatic liver tumor associated with laryngeal cancer is a very rare complication with no previous case in the literature. We present a case of ruptured liver metastases which was treated conservatively. Dynamic contrast-enhanced computed tomography demonstrated active extravasation and discontinuity of liver capsule.

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Background: Transcription factor E3 (TFE3) related renal cell carcinomas constitute a very small percent of all renal tumors in adults. Prognosis mainly depends on the stage of the disease at the time of diagnosis which is often poor. There is yet to be a standardized treatment protocol.

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Article Synopsis
  • The study looked at how well a drug called Atezolizumab (ATZ) worked for patients with a tough type of cancer that didn't respond to earlier treatment.*
  • Researchers checked the health data of 113 patients to find out which factors might affect how long they lived after taking ATZ.*
  • Important factors that seemed to be linked to shorter survival included having liver metastases, poor overall health, and low hemoglobin levels.*
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Objectives: This study is set out to estimate the radiation-absorbed doses to normal organs and tumor tissue using low-dose 177Lu-FAPI04 dosimetry to determine the safety and theranostic potential of fibroblast activation protein-targeted radionuclide therapy.

Patients And Methods: Four patients with metastatic advanced-stage cancer were administered low-dose 177Lu-FAPI04 for dosimetry measurements. Data acquisition for dosimetry of normal organs and tumors was performed by whole-body and 3D SPECT/CT imaging at 4, 24, 48, and 96 hours after administering 177Lu-FAPI04.

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Purpose: We investigated the role of PSMA-derived tumor burden in predicting docetaxel (DTX) therapy response in metastatic castration-resistant prostate cancer (mCRPC).

Methods: Fifty-two mCRPC patients who received at least six cycles of DTX as the first-line treatment following Ga-PSMA PET/CT were enrolled in this retrospective study. Total PSMA-derived tumor volume (TV-PSMA) and total lesion PSMA activity (TL-PSMA) were derived from metastatic lesions.

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Prostate-specific membrane antigen (PSMA) overexpression in various tumors are demonstrated in both in vitro and in vivo studies. Prostate-specific membrane antigen-directed radionuclide therapies are generally used in prostate cancer and could be also useful in PSMA-avid other malignancies. Herein, we present a case of a 46-year-old male patient who had progressive metastatic testicular mixed germ cell tumor, despite repeated operations and treatments.

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Background: Atezolizumab (ATZ) has demonstrated antitumor activity and manageable safety in previous studies in patients with locally advanced or metastatic platinum-resistant urothelial carcinoma.

Objective: To compare the real-life experience and data of clinical trials on ATZ treatment in metastatic urothelial carcinoma.

Design, Setting, And Participants: Patients with urothelial cancer treated with ATZ after progression on first-line chemotherapy from an expanded access program were retrospectively studied.

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Introduction: Sunitinib (SUN) and pazopanib (PAZ) are 2 oral tyrosine kinase inhibitors against vascular endothelial growth factor. Their efficacy and safety in metastatic renal cell carcinoma has been proven with phase iii studies. However, real world data is limited.

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MicroRNAs (miRNAs) have major roles in nearly all cellular process including gene expression, and may behave as oncogene or tumor suppressor gene by binding to complementary sequences in the target mRNA. The circulating microRNA-15a (miRNA-15a) and microRNA-16-1 (miRNA-16-1) of 15 healthy adults and of 40 untreated patients diagnosed with diffuse large B-cell lymphoma (DLBC) were recruited to investigate the expression levels. The expression levels of miRNA-15a, and miRNA-16-1 genes of the untreated DLBCL patients, and healthy individuals with matched age, sex and ethnicity were examined.

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Aim Of The Study: Patients with large and high-grade extremity soft-tissue sarcoma are at significant risk for distant metastasis and sarcoma-related death. There is no randomized trial comparing chemoradiotherapy to radiotherapy in the neoadjuvant setting for high risk extremity soft-tissue sarcoma. The aim of this study is to evaluate the outcomes of patients treated with two different modalities (neoadjuvant sequential chemoradiotherapy vs.

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We present a case of a teratoma with somatic type malignancy (TSM) in the form of papillary renal cell carcinoma (pRCC) within supraclavicular and retroperitoneal lymph node metastases of a testicular pure teratoma. Resection of both masses revealed a teratoma without any other germ cell tumor component. A papillary carcinoma component was also detected intermingled with the teratomatous elements.

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M30 and M65 are circulating fragments of cytokeratin 18 released during apoptotic cell death and regarded as markers of cell death in patients with various tumor types. Our aim was to investigate the clinical and prognostic significance of the serum M30 and M65 concentrations in patients with advanced nasopharyngeal carcinoma. Thirty-two patients with nasopharyngeal cancer and 32 control subjects were investigated.

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Aim: This study aimed to assess the clinical efficacy and toxicity of sunitinib, a targeted-agent, for non-clear cell renal cell carcinoma.

Patients And Methods: Sixty-three patients with complete clinical data from 13 oncology Centers were retrospectively evaluated. Outcomes analyzed were objective response rate (ORR), progression-free survival (PFS), overall survival (OS) and adverse events.

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This study aimed to examine the associations between mitogen activated protein kinase (MAPK), Akt, and topoisomerase II expression and other well established clinical and pathological prognostic factors in patients with breast cancer. A total of 42 women with breast cancer who underwent anthracycline based chemotherapy were included in this retrospective study. Immunohistochemical methods were utilized to examine the expression of phosphorylated MAPK (pMAPK), phosphorylated Akt (pAkt), HER-2/neu and topoisomerase IIα (topo IIα) in tissue blocks.

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Aim: The aim of the present study was to evaluate the results of treatment and prognostic factors in adult patients with recurrent or refractory Ewing's sarcoma family tumors (ESFT).

Patients And Methods: We retrospectively evaluated treatment outcomes of 54 consecutive patients with ESFT (aged 15 years or more) with complete medical records, who were treated with multimodal therapies after recurrence at the Istanbul University, Institute of Oncology.

Results: The commonly used chemotherapy regimens at relapse were ifosfamide and etoposide (IE), ifosfamide and etoposide plus carboplatin (ICE), and oral etoposide.

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Desmoid tumors (DTs) are benign tumors that exhibit fibroblastic proliferation, which arises from fascial or musculoaponeurotic structures. The aim of this study was to investigate the characteristics and outcomes of patients with resectable DTs. A total of 21 patients were included and their clinicopathological characteristics were retrospectively analyzed.

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Aims And Background: To investigate the efficacy and tolerability of biweekly scheduled triplet chemotherapy consisting of gemcitabine, cisplatin and vinorelbine for chemotherapy-naïve advanced non-small cell lung cancer.

Methods And Study Design: Patients with stage IIIB/IV non-small cell lung cancer and performance status of 0-2 were eligible. Patients who had brain metastasis and of an older age were also enrolled in the study.

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Objective: We investigated the prognostic clinicopathologic factors associated with overall survival (os) and progression-free survival (pfs) in the once-daily continuous administration of first-line sunitinib in a consecutive cohort of Turkish patients with metastatic renal cell carcinoma (rcc).

Methods: The study enrolled 77 Turkish patients with metastatic rcc who received sunitinib in a continuous once-daily dosing regimen between April 2006 and April 2011. Univariate analyses were performed using the log-rank test.

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Purpose: Hypertension is one of the major side effects of sunitinib, an angiogenesis inhibitor used in the treatment of metastatic renal cell carcinomas (mRCC) and gastrointestinal stromal tumors (GIST). Endothelial dysfunction, an early and reversible event in the pathogenesis of atherosclerosis, is suggested to be one of the possible underlying mechanisms of hypertension caused by angiogenesis inhibitors. Coronary flow reserve (CFR) measurement by trans-thoracic Doppler echocardiography (TTDE) reflects coronary microvascular and endothelial functions, as a cheaper and an easy screening test.

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Adjuvant chemoradiotherapy (CRT) is the standard of care for gastric cancer patients in the USA. However, in countries where D2 lymph node dissection is performed, the effect of radiotherapy on locoregional recurrence is controversial. The aim of this study is to compare the outcomes in pN3 gastric cancer patients following two adjuvant treatment modalities: chemotherapy (CT) and CRT after D2 lymph node dissection.

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