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Evin Büyükünal

Evin Büyükünal
Cerrahpaşa Medical Faculty İstanbul,Turkey · medical oncology

Prof M.D

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59
Publications
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572
Citations

Publications

Publications (59)
Article
Full-text available
The prognostic importance of perineural invasion (PN) in colorectal cancer (CRC) is unclear. The aim of this study to find out whether the PN was an independent stratification factor of postoperative relapse in curatively resected high-risk stage II & III CRC patients who were treated with adjuvant therapy. Data of patients with high risk stage II...
Article
Purpose: Some previous studies suggested that certain rectal cancer patients with stage T3N0 and favorable features may be adequately treated with surgery and adjuvant chemotherapy. However, the optimal management of clinical (c) T3N0 rectal adenocarcinoma based on preoperative imaging is unclear. In this study, we aimed to determine the frequency...
Article
Full-text available
Background: Overexpression of p185HER2 is an established poor prognostic factor in breast cancer, portending an aggressive course and potential for early metastasis. On the other hand, monoclonal antibody trastuzumab is widely used in the clinic to target this overexpressed oncogene. Unfortunately, ~30-40% of all patients overexpressing HER2 respo...
Article
Full-text available
HER2 expression in the primary tumor and its lymph node metastases vary in gastric cancer, reflecting intratumoral heterogeneity. This finding also suggests that proliferation of a different clone in metastatic nodes is possible. In the current study, we aimed to determine the cause of discordance in HER-2 expression in the primary tumor and lymph...
Article
The study populations of previous preoperative chemoradiotherapy (pre-CRT) studies have consisted of mixed clinical stages, such as cT3-cT4 and/or cN positive. For this reason, it has not been possible to demonstrate whether pre-CRT is of benefit for individual subgroups. The medical records of 137 rectal cancer patients with clinical stage T3, N0...
Article
Full-text available
Objective: It was the aim of this study to evaluate maintenance therapy with bevacizumab + capecitabine following induction with bevacizumab + capecitabine + oxaliplatin (XELOX) versus bevacizumab + XELOX until progression as first-line therapy in metastatic colorectal cancer (mCRC). Methods: Patients received either bevacizumab (7.5 mg/kg) + XE...
Article
Full-text available
Objective: The aim of this study was to determine age-specific incidence ratios, gastric cancer localization trend, histologic subtype and cancer related survival that whether have changed during the period from 1999 to 2010. Materials and methods: A total of 866 gastric cancer patients treated at the hospital were retrospectively evaluated. Cat...
Article
Preoperative chemoradiotherapy (CRT) is the standard treatment modality in locally advanced rectal cancer. The primary aim was to correlate pathological complete response (pCR) with patient outcome, and the secondary objective was to identify predictive factors of pCR. Patients with clinical stage II/III rectal cancer who received preoperative CRT...
Article
Full-text available
Background: Helicobacter pylori (H. pylori) is one of the risk factors for gastric cancer (GC). Any prognostic effect of HER-2 status in gastric lymph node metastasis in H. pylori positive cases is unknown. Materials and methods: A total of 74 patients, 47 (64%) male, and 27 (34%) female, who had subtotal or total gastrectomy and also positive l...
Article
In certain cell culture studies, significant CEA expression was observed in K-ras mutant cells. However, the relationship between high CEA levels and K-ras status has not been sufficiently investigated. In the present study, we aimed to determine the prognostic role of initial CEA and CA 19-9 values in metastatic colorectal cancer patients accordin...
Article
Purpose: Unlike cetuximab, there is a paucity of biomarkers for bevacizumab as predictors of outcome in metastatic colorectal cancer (mCRC) patients. Obviously exploring the worth of some potential markers in this setting is warranted. The purpose of this study was to investigate the predictive value of the presence of K-RAS and B-RAF mutations on...
Article
Full-text available
Aim: To evaluate the location, histopathology, stages, and treatment of gastric cancer and to conduct survival analysis on prognostic factors. Methods: Patients diagnosed with of stomach cancer in our clinic between 2000 and 2011, with follow-up or a treatment decision, were evaluated retrospectively. They were followed up by no treatment, adjuv...
Article
Full-text available
The aim of this study is to evaluate the effects of prognostic factors on the overall survival (OS) and locoregional control (LC) among male breast cancer (MBC) patients treated at Cerrahpasa Medical School Hospital, along with a review of the related literature. The data of 86 patients treated for MBC from 1973 to 2010 are retrospectively reviewed...
Article
Full-text available
Background: This study was designed to examine changing trends in localization of gastric cancer in Turkey in recent years. Materials and methods: A total of 796 adult patients with newly diagnosed, histologically proven adenocarcinomas, treated and followed up at our oncology center between 2000-2011, were examined retrospectively. In all cases...
Article
Full-text available
Introduction. Hepatic metastases of gastric adenocarcinomas are frequently observed due to the drainage into portal vein. Intestinal metastases disseminate from gastrocolic and mesenteric ligaments but they are seen very rarely and in most cases detected in postmortem studies. Case Report. A 74-year-old female patient with no known history of disea...
Article
Full-text available
Objective: The aim of this study was to evaluate tumor characteristics, management and survival in elderly male breast cancer patients in comparison with younger men. Methods: We reviewed medical records of 99 male breast cancer patients between 1972 and 2011. The median age of the patients was 64.5 years. Patient characteristics including clini...
Article
Full-text available
Background The aim of this study was to investigate age-specific incidence rates and to compare disease stage, treatment, and survival according to age group in patients with gastric adenocarcinoma. Methods Gastric cancer patients treated at our hospital between 1999 and 2010 were retrospectively evaluated. We divided the cases into two subgroups:...
Article
Full-text available
Objective: The prognostic significance of perineural invasion (PNI) in gastric cancer has been previously investigated but not clearly clarified. The objective of our study was to investigate the role of PNI as prognostic factor in patients undergoing curative surgical resection and without distant metastasis in comparison with other clinicopathol...
Article
e21143 Background: Thromboembolic events are frequent and important complications causing mortality and morbidity in cancer patients.To determine the charecteristics of these events can help us to determine the patients who have higher risks for thromboembolism. Methods: Characteristics of clinically or radiologically determined thromboembolic even...
Article
Full-text available
3565 Background: Colorectal cancer is one of the most frequent malignancies, second after breast cancer in women and third after lung cancer and prostate cancer in men. The aim of this study was to evaluate and compare the progression-free survival (PFS) between two arms: Arm A is a combination of BEV + XELOX; Arm B is a combination of BEV + XELOX...
Article
474 Background: Colorectal cancer is one of the most frequent malignancies, second to breast cancer in women and third to lung cancer and prostate cancer in men. The aim of this study in first-line metastatic colorectal cancer (mCRC) was to achieve a better progression-free survival (PFS) and less risk of toxicity by administrating bevacizumab (BEV...
Article
OBJECTIVES: We evaluated the results of patients with gastric carcinoma who were treated with postoperative chemoradiotherapy. METHODS: Seventy-six patients with gastric carcinoma, treated with postoperative chemoradiotherapy between 2003 and 2007, were retrospectively evaluated. There were 57 males. The median age was 55.5 years (34-73 years). Che...
Article
Paraneoplastic pemphigus is a severe mucocutaneous disease associated with B-cell lymphoproliferative disorders. A 51-yr-old man presented to the oncology clinic with mucocutaneous skin lesions after six cycles of fludarabine for non-Hodgkin's lymphoma. A punch biopsy from the skin showed suprabasal acantholysis and blister formation in the epiderm...
Article
To investigate the role of postoperative concomitant chemo-radioimmunotherapy in gastric adenocarcinoma patients. 59 patients, who underwent total or subtotal gastrectomy, with lymph node involvement, positive microscopic surgical margins or serosal involvement were included in the study. Radiotherapy started concomitantly with chemotherapy and lev...
Article
Primitive neuroectodermal tumor (PNET) of the pancreas is extremely rare. Although the diagnosis of PNET is suggested by the light microscopic appearance of the tumor, it should be confirmed by the immunohistochemical evaluation of the c-myc expression and if possible, further determination of the particular chromosome translocation, t(11;22)(q24,q...
Article
Primitive neuroectodermal tumor (PNET) of the pancreas is extremely rare. Although the diagnosis of PNET is suggested by the light microscopic appearance of the tumor, it should be confirmed by the immunohistochemical evaluation of the c-myc expression and if possible, further determination of the particular chromosome translocation, t(11;22)(q24,q...
Article
Family history and hepatitis B virus (HBV) infection have been identified as risk factors for hepatocellular carcinoma. We report hepatocellular carcinoma (HCC) diagnosed at the same time in identical twin brothers. Serological analyses of the patients showed that both were chronically infected with HBV. Molecular analyses of the tumor specimens co...
Article
Anemia is a frequent complication of cancer and its treatment. A defect in erythropoietin production has been advocated as being the main cause of anemia in cancer patients. We studied serum erythropoietin levels in 74 patients with solid tumors and in a control group consisting of 20 otherwise healthy individuals without any malignancy, who have o...
Article
CA-125, a commonly used tumor marker for epithelial ovarian cancer, is a glycoprotein found in normal tissues derived from coelomic epithelia. Increased serum levels of CA-125 have also been found in nongynecologic tumors and nonmalignant diseases involving the peritoneum. A few recent studies and sporadic case reports have reported increased CA-12...
Article
Anorectal melanoma is an extremely rare malignancy with poor prognosis. Patients generally present with a sensation of mass and rectal bleeding, which is usually attributed to hemorrhoids or polyps. It can not be diagnosed early because of these benign symptoms, so it is bulky at the time of presentation. Despite aggressive surgery, 5-year survival...
Article
This study was undertaken to investigate a possible association of anticardiolipin antibodies (ACLAs) in cancer patients with thromboembolic events. Twenty-five patients with solid tumors complicated with acute thrombosis, 36 cancer patients without any thrombotic events, and a group of 20 healthy volunteers without thrombosis or malignancy were in...
Article
Tuberculosis may be difficult to diagnose when it presents in an uncommon extrapulmonary site. The authors report a case of splenic tuberculosis mimicking metastatic tumor on computed tomography in a 60-year-old woman who had been treated with combination chemotherapy for nasal angiocentric lymphoma. Diagnostic splenectomy revealed multiple necroti...
Article
The first Phase I Trial with a combination of IL-2 and IFN-alpha was published in 1989. There are still some questions though, concerning the in vivo effects of this combination on lymphocytes. We designed a prospective pilot study to evaluate in vivo effects of low dose IL-2 and IFN-alpha combination on expression of Bcl-2, FAS (Apo-1/CD 95), Fas...
Article
Bone marrow involvement is a frequent finding in malignant lymphoma. Bone marrow biopsy of the posterior iliac crest is routinely performed for staging. Abnormal magnetic resonance imaging (MRI) signals of bone marrow was also reported to be indicative of bone marrow involvement. This study included 60 patients with malignant lymphoma. Unilateral b...
Article
Purpose: Single agent vinorelbine and infusional 5-fluorouracil (5-FU) have demonstrated clinical activity in patients with chemoresistant advanced breast cancer (ABC). Due to the absence of significant overlapping toxicity, we performed a pilot phase II study combining protracted venous infusion (PVI) of 5-FU with vinorelbine in patients with refr...
Article
Purpose: We report on the case of a young boy with Ki-1 positive duodenal lymphoma with duodenocolic fistulas that was misdiagnosed as carcinoma. Although morphologic features of the specimen and negative immune staining leukocyte common antigen (LCA) strongly suggested duodenal carcinoma, a dramatic response to treatment has to remind us of the po...
Article
A pilot study of neoadjuvant chemotherapy with cyclophosphamide-epirubicin-5-fluorouracil (FEC) was performed on 85 patients with locally advanced breast cancer. Patients received four cycles of neoadjuvant chemotherapy followed by surgery, radiotherapy and a treatment with cyclophosphamide-methotrexate-5-fluorouracil for three cycles. Major clinic...
Article
Aims and background: A pilot study of neoadjuvant chemotherapy with cyclophosphamide-epirubicin-5-fluorouracil (FEC) was performed on 85 patients with locally advanced breast cancer. Methods and study design: Patients received four cycles of neoadjuvant chemotherapy followed by surgery, radiotherapy and a treatment with cyclophosphamide-methotrexat...
Article
Interleukin-2 (IL-2) is a glycoprotein with significant immune effects. Our aims in this study were to define the early immune response of low-dose IL-2 therapy in patients with metastatic malignant melanoma. Ten patients with metastatic malignant melanoma with no prior therapy and 10 healthy persons as a control group were included in the study. I...
Article
Objective: Twenty-five patients with choriocarcinoma who admitted to Department of Medical Oncology in Cerrahpasa Faculty of Medicine from the year of 1986 to 1992 were evaluated according to their clinical features and treatment modalities. The purpose of this study was to investigate the effects of chemotherapy in patients with choriocarcinoma. S...
Article
In this retrospective study, a total of 146 patients with non-Hodgkin's lymphoma were evaluated for gastrointestinal involvement. Twenty-two patients (14 gastric, 8 intestinal) were identified and their charts and pathologic reports were examined. Median survival time was 8 months (range 3-117), overall 1-year survival was 55% and 5-year survival 3...
Article
The effects of different chemotherapy protocols on survival were evaluated in 197 small cell lung cancer patients followed-up between 1974 and 1987 in our unit. Of these, 170 patients had Stage IV disease and 24 had Stage III disease. Thoracic radiotherapy was given to 73 patients of whom 63 had Stage IV disease. Cytotoxic chemotherapy was given in...
Article
The effect on long-term survival of immunomodulation adjuvant to various cytotoxic chemotherapy regimens in non-small cell lung cancer (NSCLC) was evaluated in 669 patients followed up between 1974 and 1987. Four hundred seventeen patients were treated only by cytotoxic chemotherapy and served as controls. Two hundred fifty-two patients received wa...
Article
Mitoxantrone (Novantrone, N) is a new anthracenedione derivative with structural similarities to doxorubicin (Adriamycin, A). It has shown significant activity during phase I and II clinical trials in the treatment of advanced breast cancer. The present trial compares the CNF regimen to CAF. All patients received cyclophosphamide (500 mg/m2) and 5-...
Article
198 patients with colorectal carcinoma were given chemotherapy. Adjuvant chemotherapy was applied to 73 patients, postoperatively, with Dukes A, B, C disease. 125 patients were Dukes D. The four different chemotherapy regimens comprised fluorouracil (5-FU) alone, 5-FU plus levamisole, 5-FU plus mitomycin-C and 5-FU plus adriamycin. Median survival...
Article
The aim of this study was to investigate the effects of prior administration of cimetidine in radionuclide imaging of Meckel's diverticulum. In three groups of seven rats with artificial Meckel's diverticulum, containing ectopic gastric mucosa, the effects of pentagastrin + glucagon plus 99mTc-pertechnetate, as well as cimetidine premedication plus...

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Project
breast cancer