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Permanent URI for this collectionhttps://hdl.handle.net/11443/932

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Author: search.filters.author.Sumbul, Ahmet Taner

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    The Prognostic Significance of Complete Response Rates in Patients with Extensive Stage Small Cell Lung Cancer
    (KARE PUBL, 2019-01-01) Sedef, Ali Murat; Calikusu, Zuleyha; Bahceci, Aykut; Gokcay, Serkan; Sumbul, Ahmet Taner
    OBJECTIVE Small cell lung cancer (SCLC) is the most aggressive type of lung cancer. Platinum-etoposide chemotherapy combination is used as first line treatment. The aim of this trial is evaluate the effect of complete response rates and clinical features in patients with extensive stage (ES) SCLC. METHODS In this retrospective study, a total of 117 patients from four different oncology centers in Turkey between 2011 and 2017 were divided into 2 groups, namely, patients with complete response (group 1) and those with no complete response (group 2) after platin-etoposide combination therapy. RESULTS The median age of the patients was 61 (range 38-81) years. The median follow-up time was 12 months and 95 (81\%) patients died. Progression-free survival (PFS) and overall survival (OS) were estimated, respectively, as 8 and 13 months. Overall survival of group 1 patients was statistically significantly better than the group 2 (16 versus 10 months respectively and p=0.00). The overall survival of patients who had late recurrent disease (>6 mo.) was statistically significantly better than the early ones (<6 mo) (19 versus 14 months respectively and p=0,008). CONCLUSION Complete response and recurrent free time were the prognostic factors for ES SCLC patients in our study
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    Prognostic value of basal neutrophil lymphocyte ratio in patients with extensive stage small cell lung cancer
    (CUKUROVA UNIV, FAC MEDICINE, 2018-01-01) Sedef, Ali Murat; Calikusu, Zuleyha; Bahceci, Aykut; Gokcay, Serkan; Besen, Ali Ayberk; Sumbul, Ahmet Taner
    Purpose: The neutrophil-lymphocyte ratio (NLR), platelet-lymphocyte ratio (PLR) and lymphocytopenia are markers of poor prognosis in lung cancer patients. The aim of this trial is evaluate the prognostic significance of basal NLR, PLR and lymphocytopenia in patients with extensive stage (ES) small cell lung cancer(SCLC). Materials and Methods: This study was designed as a hospital-based retrospective observational case-series study. A total of 117 patients with extensive stage small cell lung cancer have been treated at four different oncology centers in Turkey between 2011 and 2017. Laboratory results and demographic data were collected. Results: The median follow-up time was 12 months and 95 (81\%) patients died. Progression-free survival (PFS) and overall survival (OS) were estimated, respectively, as 8 and 13 months. 65 (55.6 \%) patients had complete response at the end of first line platin-etoposide combination treatment. The cut-off value for NLR and PLR were determined for whole group and patients were dichotomized into high (>= 3.28) and low (<3.28) NLR groups and high (>= 139.8) and low (< 139.8) PLR groups.. Median OS was lower in patients who had high neutrophil lymphocyte ratio (NLR) (14 versus 12 months respectively). Conclusion: This study showed that basal NLR may have prognostic biological value in patients with ES SCLC treated with cisplatin + etoposide.
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    Clinicohistopathological features and treatment outcomes of neuroendocrine tumors: a single center experience
    (CUKUROVA UNIV, FAC MEDICINE, 2018-01-01) Sedef, Ali Murat; Kose, Fatih; Sumbul, Ahmet Taner; Mertsoylu, Huseyin; Besen, Ali Ayberk; Sezer, Ahmet; Ozyilkan, Ozgur; Abali, Huseyin
    Purpose: Tumor and patient characteristics of neuroendocrine tumors (NET) significantly change between geographical locations that probably induced by environmental and genetic factors throughout the world. Therefore, reporting single center experience may help clarifying epidemiological view and improving decision-making process. Materials and Methods: We performed retrospective analysis of 115 patients of NETs those who followed by Baskent University, department of Medical Oncology and department of General Surgery to record patients and tumors characteristics, treatment modalities, survival rates, and prognostic factors. Results: Median overall survival (OS) time for all group and localized NETs were 44 and 24 months, respectively. Most common primary site was found as gastrointestinal system and then pancreatic region. Curative surgical resection rate was 46\% and 8.5\% of patients presented with carcinoid syndrome. Liver metastasis was far the most common metastatic site compared to lung, bone, and lymph node metastasis. Over 70 percent of patients were treated with chemotherapy and somatostatin analogs. Conclusion: Patients with higher grade, male gender, and advanced age (>65 years old) had poor survival rate. However, relatively low number of patients and less usage of (<10\%) of new treatment modalities created limitations for producing future directions from our study.
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    Can Low Molecular Weight Heparins Circumvent the Problem of Coumadine and Chemotherapy Interaction in Cancer Patients with Prosthetic Heart Valves?
    (ASIAN PACIFIC ORGANIZATION CANCER PREVENTION, 2014-01-01) Sezer, Ahmet; Sumbul, Ahmet Taner; Abali, Gulcan; Sumbul, Zehra; Muallaoglu, Sadik; Abali, Huseyin