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Öğe Combination of Virtual Touch Tissue Imaging and Virtual Touch Tissue Quantification for Differential Diagnosis of Breast Lesions(Amer Inst Ultrasound Medicine, 2015) Teke, Memik; Goya, Cemil; Teke, Fatma; Uslukaya, Omer; Hamidi, Cihad; Cetincakmak, Mehmet Guli; Hattapoglu, SalihObjectives-Breast cancer is the second leading cause of death from cancer in women, and early detection is the key to successful treatment. Unfortunately, even with technological advances, the specificity of imaging modalities is still low. Therefore, we evaluated the value of a newly developed noninvasive technique, acoustic radiation force impulse imaging, for differentiating benign versus malignant breast lesions. Methods We prospectively examined 141 breast lesions in 122 patients. All lesions were classified according to the American College of Radiology Breast Imaging Reporting and Data System (BI-RADS) for mammography, BI-RADS for sonography, and Virtual Touch tissue imaging (VTI; Siemens Medical Solutions, Mountain View, CA) pattern. Internal and marginal shear wave velocity (SWV) values for the lesions were noted. The sensitivity, specificity, accuracy, and positive and negative predictive values for VTI and Virtual Touch tissue quantification (VTQ Siemens Medical Solutions) were calculated. Results The marginal SWV values were statistically higher in malignant lesions (mean +/- SD, 5.41 +/- 1.37 m/s) than benign lesions (2.91 +/- 0.88 m/s; P < .001). When the SWV cutoff level was set at 4.07 m/s, and the higher of the internal and marginal values was adopted, the combination of VTI and VTQ showed 95.1% sensitivity, 99.0% specificity, and 97.8% accuracy. Conclusions Breast Imaging Reporting and Data System category 4 lesions are the main focus of research for early detection of breast cancer. Unfortunately, BI-RADS category 4 assessment covers a-wide range of likelihood of malignancy (2%-95%). This wide range reflects the necessity for a more specific imaging modality. The combination of. VTI and VTQ could increase the diagnostic performance of conventional sonography.Öğe Differential diagnosis of idiopathic granulomatous mastitis and breast cancer using acoustic radiation force impulse imaging(Springer Japan Kk, 2017) Teke, Memik; Teke, Fatma; Alan, Bircan; Turkoglu, Ahmet; Hamidi, Cihad; Goya, Cemil; Hattapoglu, SalihPurpose Differentiation of idiopathic granulomatous mastitis (IGM) from carcinoma with routine imaging methods, such as ultrasonography (US) and mammography, is difficult. Therefore, we evaluated the value of a newly developed noninvasive technique called acoustic radiation force impulse imaging in differentiating IGM versus malignant lesions in the breast. Methods Four hundred and eighty-six patients, who were referred to us with a presumptive diagnosis of a mass, underwent Virtual Touch tissue imaging (VTI; Siemens) and Virtual Touch tissue quantification (VTQ; Siemens) after conventional gray-scale US. US-guided percutaneous needle biopsy was then performed on 276 lesions with clinically and radiologically suspicious features. Malignant lesions (n = 122) and IGM (n = 48) were included in the final study group. Results There was a statistically significant difference in shear wave velocity marginal and internal values between the IGM and malignant lesions. The median marginal velocity for IGM and malignant lesions was 3.19 m/s (minimum-maximum 2.49-5.82) and 5.05 m/s (minimum-maximum 2.09-8.46), respectively (p < 0.001). The median internal velocity for IGM and malignant lesions was 2.76 m/s (minimum-maximum 1.14-4.12) and 4.79 m/s (minimum-maximum 2.12-8.02), respectively (p < 0.001). Conclusion The combination of VTI and VTQ as a complement to conventional US provides viscoelastic properties of tissues, and thus has the potential to increase the specificity of US.Öğe Dosimetric comparison of prostate radiotherapy between pelvic node-positive and node-negative patients(IJRR-Iranian Journal Radiation Research, 2021) Zincircioğlu, Seyit Burhanedtin; Doğan, M. H.; Kaya, M. A.; Teke, Fatma;Background: The importance of dose in prostate radiotherapy is well known, and the dosimetric effects of radiotherapy in node-positive or node-negative patients with prostate cancer have become an important issue. Materials and Methods: Helical tomotherapy (TH) plans of 19 pelvic node-positive [THpn(+) plan] or node-negative [THpn(-) plan] patients with prostate cancer were retrospectively created in our clinic. In these plans, the beam angle was set to cover the planning target volume (PTV) of prostate cancer and minimize the dose to the organs at risk, including the bladder, rectum, femoral head, and bowel. Results: There were no differences in the conformity index, D-max, D-mean, and homogeneity index of PTV between the THpn (+) and THpn (-) plans (p>0.05). However, V95 in the THpn (+) plan was lower than that in the THpn (-) plan (p=0.017). Moreover, D-max, V75, V70, V65, V60, V50, V40, V30, and V20 for the rectum were not significantly different between the two plans (p>0.05), whereas D-mean was significantly different (p=0.025). D-max, V70, V65, and V60 for the bladder were not significantly different between the two plans (p>0.05), whereas V55, V50, V40, and V30 were significantly different (p<0.05). Finally, D-max and V50 for the femoral head and bowel were significantly different between the two plans (p<0.05). Conclusion: The THpn (+)] and [THpn(-) plans achieved acceptable target dose coverage in prostate radiotherapy.Öğe Dosimetric results of postoperative tomodirect radiotherapy of keloid on ear cartilage(Kare Publ, 2016) Teke, Fatma; Doğan, Mehmet Hakan; Selçuk, Caferi TayyarIn radiotherapy following surgical excision of a keloid, radiation has been delivered using various techniques, doses, and fractions. TomoDirect (TD) is a static delivery mode of TomoTherapy (Accuray, Sunnyvale, CA, USA), allowing for the use of a fixed gantry angle in place of rotational beam delivery. Described in the present report is the first instance of TD used for postoperative radiotherapy of keloid scar. A 21-year-old woman presented with keloid scar that had developed and gradually progressed on the left ear cartilage following a piercing 2 years prior. The patient underwent TD radiotherapy with 2 tangential beams 33 hours after excision. Dose to planning target volume (PTV) was 15 Gy in 3 fractions of 5.0 Gy daily, every other day, and V95 was 100%. Mean dose of left parotid was 0.21 Gy, and maximum doses of brain and left lens were 0.34 Gy and 0.02 Gy, respectively. Optimal dose and technique for safe and effective postoperative keloid radiation therapy are unclear and depend upon keloid area and size. Treatment of keloid on ear or other sites with TD radiotherapy may be an optimal strategy.Öğe Effectiveness of the addition of the brain region to the FDG-PET/CT imaging area in patients with suspected or diagnosed lung cancer(Springer-Verlag Italia Srl, 2016) Tasdemir, Bekir; Urakci, Zuhat; Dostbil, Zeki; Unal, Kemal; Simsek, F. Selcuk; Teke, Fatma; Goya, CemilPurpose We aimed to evaluate the effectiveness of the brain region imaging in FDG-PET/CT scanning of patients with suspected or diagnosed lung cancer. Materials and methods We performed the study retrospectively on the medical charts of 427 patients. We divided the FDG-PET/CT field of view (FOV) into four major imaging regions: brain, head-neck, abdomen and pelvis. Metastatic findings on these regions were checked and determined the potential of these findings to affect the chemotherapy or radiotherapy protocol or surgical management. If metastatic findings had a potential to modify these parameters, we named this situation as clinical contribution. Considering the number of bed positions of these regions, we calculated the clinical contribution of each region and named as effective clinical contribution. Then, we calculated the metastatic findings, clinical contribution, and effective clinical contribution ratios. Results We found different brain metastasis ratios for lung cancer, solitary pulmonary mass (SPM), and solitary pulmonary nodule (SPN) groups (8.7, 2.8 and 0.9 %, respectively). In addition, the clinical contribution and effective clinical contribution ratios in the brain region for these three groups were 6.4, 2.8, 0.0 and 6.4, 2.8, 0.0 %, respectively. The highest metastatic findings (30.6 %) and clinical contribution (9.8 %) ratios were found in the abdomen region of the lung cancer group. However, the highest effective clinical contribution ratio (6.8 %) was found in the brain region within the same group. Conclusions The addition of the brain region to the limited whole-body FOV in FDG-PET/CT scanning seems to be effective in the lung cancer and SPM groups, but not in the SPN group.Öğe Evaluation of New Biomarkers in the Prediction of Malignant Mesothelioma in Subjects with Environmental Asbestos Exposure(Springer, 2016) Demir, Melike; Kaya, Halide; Taylan, Mahsuk; Ekinci, Aysun; Yilmaz, Sureyya; Teke, Fatma; Sezgi, CengizhanThe purpose of this study was to investigate the potential value of certain biomarkers in predicting the presence of malignant pleural mesothelioma (MPM) in individuals environmentally exposed to asbestos. This prospective study investigated three groups; a control group composed of 41 healthy subjects, an asbestos exposure group consisting of 48 individuals, and a MPM group consisting of 42 patients. Serum levels of soluble mesothelin-related peptide (SMRP), thioredoxin-1 (TRX), epidermal growth factor receptor (EGFR), fibulin-3, syndecan-1 (SDC-1), and mesothelin were determined. Benign pleural plaques were present in 27 (58.3 %) of the individuals in the asbestos exposure group. The asbestos exposure group had significantly higher mean TRX, SMRP, and mesothelin levels compared to the control group (p = 0.023, p = 0.011, and p < 0.001, respectively). Compared to the asbestos exposure group, the MPM group had significantly higher mean EGFR, TRX, SMRP, and fibulin-3 levels (p = 0.041, p = 0.023, p = 0.002, and p = 0.001, respectively), and significantly lower mean SDC-1 levels (p = 0.002). Unlike the other biomarkers, SMRP and TRX levels increased in a graded fashion among the control, asbestos exposure, and MPM groups, respectively. Area under the curve values for SMRP and TRX were 0.86 and 0.72, respectively (95 % CI 0.79-0.92 and p < 0.001 for SMRP, and 95 % CI 0.62-0.81 and p < 0.001 for TRX). The cut-off value for SMRP was 0.62 nmol/l (sensitivity: 97.6 %, specificity: 68.9 %, positive predictive value (PPV): 56.2 %, and negative predictive value (NPV): 98.3 %) and for TRX was 156.67 ng/ml (sensitivity: 92.9 %, specificity: 77.6 %, PPV: 41.4 %, and NPV: 92.1 %). The combination of the biomarkers reached a sensitivity of 100 %, but had lower specificity (as high as 27.7 %). Serum biomarkers may be helpful for early diagnosis of MPM in asbestos-exposed cases. SMRP and TRX increased in a graded fashion from the controls to asbestos exposure and MPM groups. These two seem to be the most valuable biomarkers for the diagnosis of MPM, both individually and in combination.Öğe Evaluation of outcome and prognostic factors in 739 patients with uterine cervix carcinoma: a single institution experience(Termedia Publishing House Ltd, 2015) Teke, Fatma; Yoney, Adnan; Teke, Memik; Adanas, Gultekin; Urakci, Zuhat; Tukcu, Gu; Eren, BekirAim of the study: The aim of this retrospective chart review was to determine the long-term outcomes and identify prognostic factors that impact the survival of patients with cervical cancer. Material and methods: A retrospective chart review of 739 patients with International Federation of Gynaecology and Obstetrics (FIGO) stage I-IV cervical cancer treated with surgery, radiation or chemoradiation was performed. Patient charts were evaluated in terms of demographics, clinical outcomes, and survival. Disease-free survival (DFS) and overall survival (OS) were calculated with the Kaplan-Meier method, and differences in survival were compared with the log-rank test. Multivariate analysis was performed with a Cox proportional hazards model to determine the estimated hazard ratios (HR) with 95% confidence intervals (CI) for each prognostic factor. Results: The Cox proportional hazards model demonstrated that pelvic nodal metastasis (p = 0.018), parametrial invasion (p = 0.015), and presence of disease in the surgical margin (p = = 0.011) were all independent prognostic factors for OS. The 5-year OS rate of patients with negative pelvic lymph nodes was 67.1%, which was higher than the rate for those with positive nodes at 49.0% (p < 0.05). The 5-year OS rate was 54.3% for patients with metastasis to the parametrium, 79.2% with a cancer-free parametrium, 60.9% with a cancer-positive surgical margin, 85.4% with a cancer-negative surgical margin, and 64.3% with a 1-3 mm close surgical margin (p < 0.05). Conclusions: Assessing pelvic lymph nodes, the parametrium, and surgical margins is important for survival and may aid in better identifying patients who would derive greater benefits from receiving adjuvant therapies and more aggressive treatments.Öğe Evaluation of pulmonary function after radiotherapy using helical tomotherapy for breast cancer treatment: Prospective study(KARE yayıncılık, 2016) Teke, Fatma; Demir, Melike; Bucaktepe, Pakize Gamze Erten; Kaya, Mehmet Ali; Doğan, Mehmet Hakan; Küçüköner, Mehmet; Zincircioğlu, Seyit Burhanedtin; Teke, MemikPurpose of the present study was to investigate acute pulmonary changes using pulmonary function tests (PFTs) after breast cancer irradiation with helical tomotherapy (HT). METHODS Forty patients were included in this study. Pretreatment and 3 months after completion of radiotherapy (RT), values of forced vital capacity (FVC), forced expiratory volume in first second (FEV1), and FEV1/ FVC ratio were measured and recorded. RESULTS Restrictive pattern was seen in 4 patients in baseline PFTs and moderate deterioration was observed in their measurements of PFT at 3 months after RT. Obstructive pattern was defined in only 1 patient in baseline PFTs and it remained unchanged after RT. Mild obstructive pattern in 4 patients and mild restrictive pattern in 3 patients had developed at 3 months after RT. CONCLUSION Minimal changes that result in mild restrictive and obstructive pattern in PFTs can be seen in acute phase after RT with HT.Öğe The impact of the stage and tumor size on brain metastasis of cervical cancer.(Amer Soc Clinical Oncology, 2015) Teke, Fatma; Tunc, Senem Yaman; Teke, Memik; Turan, Yahya; Urakci, Zuhat; Altin, Suleyman; Eren, Bekir[Abstract Not Available]Öğe The impact of the stage and tumor size on rare brain metastasis of cervical cancer(Turkish Neurosurgical Soc, 2016) Teke, Fatma; Tunç, Senem Yaman; Teke, Memik; Turan, Yahya; Urakçı, Zuhat; Eren, Bekir; Altın, SüleymanAIM: To investigate the clinical features, prognostic factors and survival times of cervical cancer patients with brain metastasis. MATERIAL and METHODS: We retrospectively reviewed the medical records of 820 patients with cervical cancer. Data were analyzed using SPSS version 12.0 statistical software (SPSS, Chicago, IL, USA). Overall survival, time interval from diagnosis of cervical cancer to identification of brain metastasis, and median survival time after diagnosis of brain metastasis were calculated using Kaplan-Meier curve analysis. The log-rank test was used to compare differences in survival. Differences were assumed statistically significant when p-values were <0.05. RESULTS: The incidence of brain metastases from cervical cancer in our institution was 1.82% (15/820) over a ten-year period. The median time interval from diagnosis of cervical cancer to detection of brain metastasis was 12.5 months (range: 2.9-91.9 months). Stage and tumor diameter were found to be significant relating to the interval from diagnosis of cervical cancer to detection of brain metastasis (p=0.001 for both). CONCLUSION: This study provides much information about the prognosis of patients with brain metastases from cervical cancer and highlights the importance of initial stage and tumor diameter when determining the time interval until development of brain metastasis.Öğe Kaposi sarkomu nedeniyle radyoterapi uygulanan 14 hastanın değerlendirilmesi(Dicle Üniversitesi Tıp Fakültesi, 2015) Teke, Fatma; Akkurt, Zeynep Meltem; Yıldırım, Özgür; Teke, Memik; Zincircioğlu, Seyit BurhanedtinAmaç: Çalışmamızda Kaposi sarkomu (KS) tanısı nedeniyle radyoterapi (RT) uygulanan hastaların klinik özelliklerini ve tedavi sonuçlarını değerlendirdik. Yöntemler: Çalışmaya Dicle Üniversitesi Hastanesi Radyasyon Onkolojisi Kliniği’nde 2005-2012 yılları arasında RT uygulanan KS tanılı hastalar dahil edildi. Tüm hastalara semptomların palyasyonu ve yaşam kalitesini arttırmak için farklı doz-fraksiyonasyon şemaları ile RT uygulandı. Birden çok bölgesinde lezyonu olan hastalara aynı veya farklı tarihlerde RT uygulandı. Hastaların radyoterapiye cevapları tam veya kısmi yanıt olarak kaydedildi. Bulgular: KS nedeniyle radyoterapi uygulanan 14 hasta retrospektif olarak değerlendirildi. On dört hastanın toplam 22 farklı bölgesine RT uygulandı. Altı hastada (%27,3) iki ayrı bölge ışınlanırken, yalnız bir hastada (%4,5) üçüncü bölge olarak glans penisteki lezyona RT uygulandı. Işınlamalarda 6 MV ve 10 MV foton enerjileri ile 6 MeV, 9 MeV ve 12 MeV elektron enerjileri kullanıldı. Foton ışınlamalarında homojen doz dağılımı elde etmek için su fantomu veya bolus materyali kullanıldı. Uygulanan RT dozu toplam 22 farklı bölge için medyan 800 cGy (800-3000 cGy) idi. RT fraksiyon sayısı medyan 1’di (1-10). Tedavi yanıtları değerlendirildiğinde 4 (%18,1) bölgede stabil hastalık mevcuttu. Sekiz (%36,4) tedavi bölgesinde kısmi cevap sağlanırken, 10 (%45,5) bölgede de tam cevap elde edildi. Dört (%57,3) tedavi bölgesinde RT’ ye bağlı ayaklarda ve bacaklarda akut dönemde yaygın lenfödem gözlendi. İki (%28,7) bölgede ise ağrı komplikasyonu mevcuttu. Sonuç: RT, KS lezyonlarının palyatif tedavisinde uygun ve etkili bir tedavi rejimidir. RT ile cilt lezyonlarında mükemmel cevap oranları elde edilebilir. RT sonrası lezyonlar ve kaşıntı gibi şikayetler kaybolabilir. Ağrı, ödem gibi yan etkiler destek tedavi ile giderilebilir.Öğe Lack of any Impact of Histopathology Type on Prognosis in Patients with Early-Stage Adenocarcinoma and Squamous Cell Carcinoma of the Uterine Cervix(Asian Pacific Organization Cancer Prevention, 2014) Teke, Fatma; Yoney, Adnan; Teke, Memik; Inal, Ali; Urakci, Zuhat; Eren, Bekir; Zincircioglu, Seyit BurhanedtinBackground: The aim of this study was to evaluate the prognosis of patients with stage IA-IIB cervical carcinoma and to investigate a possible correlation of histology with prognosis. Materials and Methods: Two hundred fifty one patients with adenocarcinoma and squamous cell carcinoma (SCC) histology for FIGO (International Federation of Gynecology and Obstetrics) stage IA-IIB uterine cervical carcinomas at the Radiation Oncology Clinic of GH Okmeydani Training and Research Hospital between January 1996 and December 2006 were selected, analyzed retrospectively and evaluated in terms of general characteristics and survival. Disease-free survival (DFS) and overall survival (OS) was calculated using the Kaplan-Meier method and differences were compared with the log-rank test. Multivariate analysis using a Cox-proportional hazards model was used to adjust for prognostic factors and to estimate hazard ratio (HR) with 95% confidence interval (CI). Results: There was no differences between the two tumour types in age, stage, pelvic nodal metastasis, parametrial invasion, surgical margin status, DSI, LVSI, maximal tumor diameter, grade, and treatment modalities. 5-year OS and DFS were 73% and 77%, versus 64% and 69%, for SCC and adenocarcinoma, respectively (p>0.05). Multivariate analysis revealed independent prognostic factors including pelvic nodal metastasis and resection margin status for OS (p=0.008, p=0.002, respectively). Conclusions: Prognosis of FIGO stage IA-IIB cervical cancer patients was found to be the same for those with adenocarcinoma and SCC.Öğe A multicenter retrospective analysis of patients with nasopharyngeal carcinoma treated in IMRT era from a nonendemic population: Turkish Society for Radiation Oncology Head and Neck Cancer Group Study (TROD 01-001)(John Wiley and Sons Inc., 2023) Yıldırım, Halil Cumhur; Kupik, Gülnihan Eren; Mustafayev, Teuta Zoto; Berber, Tanju; Yavuz, Berrin; Çetinayak, Oğuz; Teke, FatmaBackground: We aimed to evaluate patients with nasopharyngeal carcinoma (NPC) in a nonendemic population. Methods: In a national, retrospective, multicenteric study, 563 patients treated with intensity modulated radiotherapy at 22 centers between 2015 and 2020 were analyzed. Results: Median age was 48 (9–83), age distribution was bimodal, 74.1% were male, and 78.7% were stage III-IVA. Keratinizing and undifferentiated carcinoma rates were 3.9% and 81.2%. Patients were treated with concomitant chemoradiotherapy (48.9%), or radiotherapy combined with induction chemotherapy (25%) or adjuvant chemotherapy (19.5%). After 34 (6–78) months follow-up, 8.2% locoregional and 8% distant relapse were observed. Three-year overall survival was 89.5% and was lower in patients with age ≥50, male sex, keratinizing histology, T4, N3 and advanced stage (III-IVA). Conclusions: Patients with NPC in Turkey have mixed clinical features of both east and west. Survival outcomes are comparable to other reported series; however, the rate of distant metastases seems to be lower.Öğe Neoadjuvant Therapy and Factors Influencing Survival in Locally Advanced Non-Small Cell Lung Cancer(Springernature, 2023) Ebinc, Senar; Oruc, Zeynep; Kalkan, Ziya; Teke, Fatma; Onat, Serdar; Urakci, Zuhat; Kaplan, Muhammet AliAim: We aimed to investigate the effectiveness of neoadjuvant therapy (NAT) and clinicopathological characteristics in locally advanced non-small cell lung cancer (NSCLC) (IIIA-IIIB), as well as the influence of the post-NAT treatment modalities on survival. Materials and methods: This study included patients who presented to the Dicle University Medical Oncology Clinic and received NAT for a diagnosis of locally advanced NSCLC between 2004 and 2020. Clinicopathological and radiological data of the 57 patients whose data could be retrieved from the hospital archive system were retrospectively reviewed. Patients' overall survival (OS) and failure-free survival (FFS) times and the factors influencing these times were evaluated. Results: This study included a total of 57 patients consisting of five (8.8%) females and 52 (91.2%) males. The median patient age at diagnosis was 58 (30-75) years. All patients had received four courses of chemotherapy during the neoadjuvant period. When the factors influencing OS were evaluated, the post-NAT modality was found to have a statistically significant effect on survival. FFS times were 12, 13, and 16 months in the chemotherapy, chemoradiotherapy, and surgery arms, respectively (log-rank p=0.035). FFS was longer in those who underwent surgery (Hazard ratio (HR): 0.33, 95 % CI: 0.14-0.77, (p=0.01)). OS times were 20, 21, and 55 months in the chemotherapy, chemoradiotherapy, and surgery arms, respectively (log-rank p=0.05). OS was longer in the arm undergoing surgery compared to the other arms (HR: 0.36, 95% CI: 0.14-0.87, (p=0.02)). Five-year survival rates for the chemotherapy, chemoradiotherapy, and surgery arms were 14.3%, 21.4%, and 40%, respectively. Conclusions: This study shows that achieving an operable status is the most important indicator of survival and that patients undergoing surgery have a marked advantage in OS and FFS compared with patients receiving chemoradiotherapy or palliative chemotherapy.Öğe Proliferative Effect of Gum Tragacanth on Different Cancer Cells(Iğdır Üniversitesi, 2024) Kandemir, Sevgi İrtegün; Jahan, Israt; Teke, FatmaGum tragacanth (GT) is a natural plant exudate discharged from the twigs and stems of Asiatic species of the Astragalus genus. GT is a heterogeneous polysaccharide which has been utilized in various biomedical fields and traditionally in ethnomedicine because of its distinctive physicochemical and biological properties, such as great biocompatibility, thermal stability biodegradability, hydrophilicity and antioxidant activity. The aim of this study was to examine whether GT has cytotoxic effects on various cancer cell lines. For this aim, four cancer cell lines i.e., human colorectal adenocarcinoma (CACO-2), glioblastoma multiforme tumor (T98G), ovarian sarcoma (SKOV-3), and breast cancer (MCF-7) cells were used. GT was prepared at the concentration of 200 µg/mL, 100 µg/mL, 50 µg/mL, 25 µg/mL and 12.5 µg/mL, using both 5% DMSO and dH2O as solvent. MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) colorimetric assay was used for in vitro cytotoxicity study. GT had no cytotoxic effect on these cancer cells since cell viability percentages were found to be above 80% for all the treatments. However, remarkable dose-dependent cell proliferation efficiency of GT at certain concentrations was observed on all cancer cells except MCF-7. In conclusion, this study suggests that cancer patients should be careful about the use of GT or products containing GT due to the increasing effect of GT on the proliferation of cancer cells.Öğe Proliferative Effect of Gum Tragacanth on Different Cancer Cells(2024) İrtegün Kandemir, Sevgi; Jahan, Israt; Teke, FatmaGum tragacanth (GT) is a natural plant exudate discharged from the twigs and stems of Asiatic species of the Astragalus genus. GT is a heterogeneous polysaccharide which has been utilized in various biomedical fields and traditionally in ethnomedicine because of its distinctive physicochemical and biological properties, such as great biocompatibility, thermal stability biodegradability, hydrophilicity and antioxidant activity. The aim of this study was to examine whether GT has cytotoxic effects on various cancer cell lines. For this aim, four cancer cell lines i.e., human colorectal adenocarcinoma (CACO-2), glioblastoma multiforme tumor (T98G), ovarian sarcoma (SKOV-3), and breast cancer (MCF-7) cells were used. GT was prepared at the concentration of 200 µg/mL, 100 µg/mL, 50 µg/mL, 25 µg/mL and 12.5 µg/mL, using both 5% DMSO and dH2O as solvent. MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) colorimetric assay was used for in vitro cytotoxicity study. GT had no cytotoxic effect on these cancer cells since cell viability percentages were found to be above 80% for all the treatments. However, remarkable dose-dependent cell proliferation efficiency of GT at certain concentrations was observed on all cancer cells except MCF-7. In conclusion, this study suggests that cancer patients should be careful about the use of GT or products containing GT due to the increasing effect of GT on the proliferation of cancer cells.Öğe Quality of Life, Psychological Burden, and Sleep Quality in Patients With Brain Metastasis Undergoing Whole Brain Radiation Therapy(Oncology Nursing Soc, 2016) Teke, Fatma; Bucaktepe, Pakize Gamze Erten; Kibrisli, Erkan; Demir, Melike; Ibiloglu, Aslihan Okan; Inal, AliBackground: Patients with brain metastasis (BM) usually suffer from poor quality of life (QOL), anxiety, depression, and sleep disorders in their reduced lifespan. Objectives: The aim of this study was to evaluate QOL, anxiety, depression, and sleep characteristics in patients with BM at the beginning and end of whole brain radiation therapy (WBRT) and three months after treatment. Methods: Thirty-three patients undergoing WBRT for BM were featured in this study. The authors used the Karnofsky Performance Status (KPS) scale to measure performance status, the Hospital Anxiety and Depression Scale (HADS) to evaluate anxiety and depression, the SF-36 (R) to evaluate health-related QOL, and the Pittsburgh Sleep Quality Index to evaluate sleep disorders at the start of WBRT, the end of WBRT, and three months after WBRT. Findings: Statistically significant improvements were noted in KPS scores from baseline evaluation to the end of WBRT and to three months after WBRT. No significant differences were observed in SF-36 and HADS scores between the start and the end of WBRT. Anxiety scores were negatively correlated with survival at the end of WBRT. Overall survival was better in those who reported better sleep. WBRT improves KPS scores and does not worsen sleep quality or mood, even in patients with poor performance status. When changes in mood and sleep quality are observed, survival and QOL may improve in patients with BM; consequently, nurses should be responsive to these changes.Öğe Radiation therapy for prostate cancer in Syrian refugees: facing the need for change(Frontiers Media S.A., 2023) Eren, Mehmet Fuat; Kılıç, Sarah Sabrine; Eren, Ayfer Ay; Kaplan, Sedenay Oskeroğlu; Teke, Fatma; Kütük, TuğçePurpose: To report the utilization of radiation therapy in Syrian refugee patients with prostate cancer residing in Turkey. Methods and materials: A multi-institutional retrospective review including 14 cancer centers in Turkey was conducted to include 137 Syrian refugee patients with prostate cancer treated with radiation therapy (RT). Toxicity data was scored using the National Cancer Institute Common Terminology Criteria for Adverse Events version 3.0. Noncompliance was defined as a patient missing two or more scheduled RT appointments. Results: Advanced disease, defined as stage III or IV, was reported in 64.2% of patients while androgen deprivation therapy (ADT) was only administrated to 20% of patients. Conventionally fractionated RT with a median number of 44 fractions was delivered to all patients with curative intent (n = 61) while palliative RT (n = 76) was delivered with a median number of 10 fractions. The acute grade 3–4 toxicity rate for the entire cohort was 16%. Noncompliance rate was 42%. Conclusion: Most Syrian refugee prostate cancer patients presented with advanced disease however ADT was seldom used. Despite the low treatment compliance rate, conventional fractionation was used in all patients. Interventions are critically needed to improve screening and increase the use of standard-ofcare treatment paradigms, including hypofractionated RT and ADT.Öğe Rare occurrence of synovial sarcoma originating from dura mater(Istanbul Tip Fakultesi, 2019) Akdeniz, Nadiye; Küçüköner, Mehmet; Kaplan, Muhammet Ali; Urakçı, Zuhat; Yerlikaya, Halis; Karhan, Oğur; Teke, Fatma; Işıkdoğan, AbdurrahmanPrimary or metastatic dura mater sarcomas are rarely seen, and dural synovial sarcomas are quite rare. Here we report the case of a 60-year-old man who presented with headache, nausea, and vomiting and was found to have a 63×33×40-mm mass with solid and cystic components in parieto-occipital lobe. The mass was resected completely, with no residue detected on postoperative magnetic resonance imagining. On pathological evaluation, a vimentin-, S100-, transducer-like enhancer of split 1-, BCL-2-, and EMApositive and desmin-, PR-, CD99-, PANCK-, and GFAP-negative synovial sarcoma with Ki-67 proliferation index of 12% was detected. Postoperatively, chemotherapy has been started, and it will be followed by radiotherapy. Primary meningeal-derived sarcomas are rare, and differential diagnosis with other meningeal mesenchymal tumors is based on the findings of morphological and immunohistochemical analyses.Öğe Retrorectal Tumors in Adults: A 10-Year Retrospective Study(Int College Of Surgeons, 2015) Oguz, Abdullah; Boyuk, Abdullah; Turkoglu, Ahmet; Goya, Cemil; Alabalik, Ulas; Teke, Fatma; Budak, HidirDue to the rarity and large diversity of the primary retrorectal tumors (RTs), the diagnoses are often difficult and they can be misdiagnosed. We present our experience in light of scarce information available on the clinical manifestations of RTs. The retrospective study included 17 patients diagnosed as RTs between January 2004 and January 2014. Demographic characteristics, length of symptoms, clinical findings, diagnostic methods, evaluations on the treatment procedures and postoperative periods, pathology, complications, and length of hospital stay were recorded. A mean of 1.7 of patients were diagnosed with RTs annually in our hospital. Patients comprised 12 females and 5 males. Pain and discomfort were the most common symptoms at presentation. All the lesions were evaluated by using magnetic resonance imaging (MRI) and computed tomography (CT), and all the patients were treated operatively. Based on the preoperative MRI or CT findings, an anterior approach was performed in 7 patients, a posterior approach in 6 patients, and combined approach in 4 patients. Mean size of tumors was 9.2 +/- 4.3 cm. Epidermoid cyst (n = 8) was the most common tumor. Except for 1 case of liposarcoma, 16 tumors were confirmed to be of benign nature in histologic examination. Mean length of hospital stay 12.4 +/- 6.8 days. Retrorectal tumors are heterogeneous and lead to diagnostic difficulties. A high index of clinical suspicion is needed for diagnosis. Preoperative imaging may be helpful in determining the course of treatment. Total excision of a retrorectal tumor may alleviate pressure symptoms and confirm the diagnosis.
