Araştırma Çıktıları
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Item Primary surgery in patients with de novo stage IV BC(2021-01-01) Soran, Atilla; Ozmen, Vahit; Ozbas, Serdar; Karanlik, Hasan; Muslumanoglu, Mahmut; Igci, Abdullah; Canturk, Zafer; Utkan, Zafer; Ozaslan, Cihangir; Evrensel, Turkkan; Uras, Cihan; Aksaz, Erol; Soyder, Aykut; Ugurlu, Umit; Col, Cavit; Cabioglu, Neslihan; Erdem, Ergun; Gurleyik, Gunay; Sezgin, EfeItem Correlations Between Oncotype DX Recurrence Score and Classic Risk Factors in Early Breast Cancer: Results of A Prospective Multicenter Study in Turkey(AVES, 2016-01-01) Ozmen, Vahit; Atasoy, Ajlan; Gokmen, Erhan; Ozdogan, Mustafa; Guler, Nilufer; Uras, Cihan; Ok, Engin; Demircan, Orhan; Isikkdogan, Abdurrahman; Cabioglu, Neslihan; Sen, Fatma; Saip, PinarObjective: Breast cancer is the most common malignancy among Turkish women and the rate of early stage disease is increasing. The Oncotype DX 21-gene assay is predictive of distant recurrence in ER-positive, HER2-negative early breast cancer. We aimed to evaluate the correlations between Recurrence Score (RS) and routine risk factors. Materials and Methods: Ten academic centers across Turkey participated in this prospective trial. Consecutive patients with breast cancer who had pT1-3, pN0-N1mic, ER-positive, and HER2-negative tumors were identified at tumor conferences. Both pre- and post-RS treatment decisions and physician perceptions were recorded on questionnaire forms. Correlations between RS and classic risk factors were evaluated using univariate and multivariate analyses. Results: Ten centers enrolled a total of 165 patients. The median tumor size was 2 cm. Of the 165 patients, 57\% had low RS, 35\% had intermediate RS, and 8\% had high RS, respectively. Multivariate analysis indicated that progesterone receptor (PR) and Ki67 scores were significantly related to RS. Conclusion: Oncotype DX Recurrence Score does not seem to have a significant correlation with the majority of classic risk factors, but it may have a correlation with PR score and Ki67 score.Item Impact of Oncotype DX Recurrence Score on Treatment Decisions: Results of a Prospective Multicenter Study in Turkey(CUREUS INC, 2016-01-01) Ozmen, Vahit; Atasoy, Ajlan; Gokmen, Erhan; Ozdogan, Mustafa; Guler, Nilufer; Uras, Cihan; Ok, Engin; Demircan, Orhan; Isikdogan, Abdurrahman; Saip, PinarIntroduction: Breast cancer is the most common malignancy among Turkish women and the rate of early stage disease is increasing. The Oncotype DX (R) 21-gene assay is predictive of distant recurrence in ER-positive, HER2-negative early breast cancer. We aimed to evaluate the impact of the Recurrence Score (R) (RS) on treatment decisions and physician perceptions in Turkey. We also studied correlations between RS and routine risk factors. Patients and Methods: Ten academic centers across Turkey participated in this prospective trial. Consecutive breast cancer patients with pT1-3, pN0-N1mic, ER-positive, and HER2-negative tumors were identified at multidisciplinary tumor conferences. The initial treatment decision was recorded before tumor blocks were sent to the central laboratory. Each case was brought back to tumor conference after receiving the RS result. Both pre- and post-RS treatment decisions and physician perceptions were recorded on questionnaire forms. Correlations between RS and classical risk factors were evaluated using univariate and multivariate analyses. Results: Ten centers enrolled a total of 165 patients. The median tumor size was 2 cm. Of 165 patients, 57\% had low RS, 35\% had intermediate RS, and 8\% had high RS, respectively. The overall rate of change in treatment decision was 33\%. Initially, chemotherapy followed by hormonal therapy (CT+HT) was recommended to 92 (56\%) of all patients, which decreased to 61 (37\%) patients post-RS assay (p<0.001). Multivariate analysis indicated that progesterone receptor (PR) and Ki-67 scores were significantly related to RS. Conclusion: Oncotype DX testing may provide meaningful additional information in carefully selected patients.Item Cost effectiveness of Gene Expression Profiling in Patients with Early-Stage Breast Cancer in a Middle-Income Country, Turkey: Results of a Prospective Multicenter Study(AVES, 2019-01-01) Ozmen, Vahit; Cakar, Burcu; Gokmen, Erhan; Ozdogan, Mustafa; Guler, Nilufer; Uras, Cihan; Ok, Engin; Demircan, Orhan; Isikdogan, Abdurrahman; Saip, PinarObjective: Breast cancer is a heterogenous disease, and genetic profiling helps to individualize adjuvant treatment. The Oncotype DX is a validated test to predict benefit of adjuvant systemic treatment. The aims of this study are to determine the costs of chemotherapy in government hospitals in Turkey and evaluate the cost-effectiveness of the Oncotype DX from the national insurance perspective. Materials and Methods: A Markov model was developed to make long term projections of distant recurrence, survival, quality adjusted life expectancy, and direct costs for patients with ER+, HER2-, node-negative or up to 3 node-positive early stage breast cancer. Turkish decision impact study patient data were captured for model reference. In that study, ten academic centers across Turkey participated in a prospective trial. Of 165 patients with pT1-3, pN0-N1mic, ER-positive, and HER-2 negative tumors, 57\% had low recurrence score (RS), 35\% had intermediate RS, and 8\% had high RS, respectively. The overall rate of change in chemotherapy treatment decisions following Oncotype DX was 33\%. Results: The cost of adjuvant chemotherapy in public hospitals was estimated at \$3.649, and Oncotype Dx test was \$5.141. Based on the cost-effectiveness analysis, Oncotype DX testing was estimated to improve life expectancy (+0.86 years) and quality-adjusted life expectancy (+0.68 QALYs) versus standard care. The incremental cost-effectiveness ratio (ICERs) of Oncotype DX was estimated to be \$7207.9 per QALY gained and \$5720.6 per LY gained versus current clinical practice. Conclusion: As Oncotype DX was found both cost-effective and life-saving from a national perspective, the test should be introduced to standard care in patients with ER+, HER-2 negative early-stage breast cancer in Turkey.Item Vacuum-assisted stereotactic breast biopsy in the diagnosis and management of suspicious microcalcifications(TURKISH SOC RADIOLOGY, 2016-01-01) Esen, Gul; Tutar, Burcin; Uras, Cihan; Calay, Zerrin; Ince, Umit; Tutar, OnurPURPOSE We aimed to present our biopsy method and retrospectively evaluate the results, upgrade rate, and follow-up findings of stereotactic vacuum-assisted breast biopsy (VABB) procedures performed in our clinic. METHODS Two hundred thirty-four patients with mammographically detected nonpalpable breast lesions underwent VABB using a 9 gauge biopsy probe and prone biopsy table. A total of 195 patients (median age 53 years, range 32-80 years) with 198 microcalcification-only lesions with a follow- up of at least one year were included in the study. The location of the lesion relative to the needle was determined from the postfire images, and unlike the conventional technique, tissue retrieval was predominantly performed from that location, followed by a complete 360 degrees rotation, if needed. RESULTS The median core number was 8.5. Biopsy results revealed 135 benign, 24 atypical, and 39 malignant lesions. The total upgrade rate at surgery was 7.7\% (6.1\% for ductal carcinomas in situ and 10.5\% for atypical lesions). Patients with benign lesions were followed up for a median period of 27.5 months, with no interval change. At the follow-up, scar formation was seen in 23 patients (17\%)Item Robotic single port cholecystectomy (R-LESS-C): Experience in 36 patients(ELSEVIER SINGAPORE PTE LTD, 2014-01-01) Uras, Cihan; Boler, Deniz Eren; Erguner, Ilknur; Hamzaoglu, IsmailBackground: Laparoendoscopic single-site surgery (LESS) has emerged as a result of a search for ``pain-less{''} and ``scar-less{''} surgery. Laparoendoscopic single-site cholecystectomy (LESS-C) is probably the most common application in general surgery, although it harbors certain limitations. It was proposed that the da Vinci Single-Site (Si) robotic system may overcome some of the difficulties experienced during LESS, providing three dimensional views and the ability to work in a right-handed fashion. Thirty-six robotic single port cholecystectomies (R-LESS-C) performed with the da Vinci Si robotic system are evaluated in this paper Materials and methods: R-LESS-C performed in 36 patients were reviewed. The data related to the perioperative period (i.e., anesthesia time, operation time, docking time, and console time) was recorded prospectively, whereas the hospitalization period, postoperative visual analogue scale (VAS) pain scores were collected retrospectively. Results: A total number of 36 patients, with a mean age of 40.1 years (21-64 years), underwent R-LESS-C. There were five men and 31 women. The mean anesthesia and operation times were 79.3 minutes (45-130 minutes) and 61.8 minutes (34-110 minutes), respectively. The mean docking time was 9.8 minutes (4-30 minutes) and the mean console time was 24.9 minutes (7-60 minutes). The mean hospital stay was 1.05 days (1-2 days) and the mean pain score (VAS) was 3.6 (2-8) in the first 24 hours. Incisional hernia was recorded in one patient. Conclusion: R-LESS-C can be performed reliably with acceptable operative times and safety. The da Vinci Si robotic system may ease LESS-C. Two issues should be considered for routine use: expensive resources are needed and the incidence of incisional hernia may increase. Copyright (C) 2013, Asian Surgical Association. Published by Elsevier Taiwan LLC. All rights reserved.Item Robotic nipple sparing mastectomy through a single incision: Advantages of starting with posterior dissection(TURKISH SURGICAL ASSOC, 2020-01-01) Uras, Cihan; Arikan, Akif Enes; Kara, Halil; Dulgeroglu, Onur; Avsar, YakupObjective: Loss of breast, which is an important body marking of women, causes a huge decrease in quality of life (QoL) after treatment. In order to overcome this morbidity and increase QoL, nipple sparing mastectomy (NSM) has been developed. Even though the demand for better cosmetic results has yielded endoscopic nipple sparing mastectomy, limitations like unsuitable optical window and limited manual control of rigid-tip instruments, and struggling to keep dissection space have led robotic nipple sparing mastectomy (rNSM) to be developed. Material and Methods: Records of three patients who underwent to rNSM for invasive breast carcinoma with DaVinci Xi (Intuitive Surgical, Sunnyvale, CA) in affiliated hospitals of Acibadem Mehmet Ali Aydinlar University, Research Institute of Senology in 2018 were investigated retrospectively. In all breasts (n= 4), dissection was started from the posterior side of breast. Results: In the unit, 738 breast cancer patients underwent surgery between 2018 and 2019 with an NSM ratio of 31.4\% (n= 232). Of these patients, three underwent rNSM with DaVinci Xi robotic system. The operation was performed on the left breast in one patient, right in one, and bilateral in one patient. Only in patient \#2, who was a neoadjuvant chemotherapy recipient, seroma was observed six weeks after surgery (3 weeks after removal of drains) and spontaneously resolved in 4 weeks. No other complication was seen in all patients. In the follow-up period of median 21 months, no loco-regional recurrence or distant metastasis was seen. Conclusion: A single incision robotic mastectomy can be performed easily and safely when the dissection starts from the pre-pectoral plane rather than the subcutaneous plane.Item Role of Sentinel Lymph Node Biopsy During Contralateral Prophylactic Mastectomy(ISTANBUL TRAINING \& RESEARCH HOSPITAL, 2020-01-01) Kara, Halil; Arikan, Akif Enes; Dulgeroglu, Onur; Uras, CihanIntroduction: Contralateral prophylactic mastectomy (CPM) is the removal of the opposite breast with the aim of risk reduction in cases of unilateral breast carcinoma. Routine use of sentinel lymph node biopsy (SLNB) at the time of CPM is controversial due to low occult breast cancer risk. This study aims to determine the rate of occult breast carcinoma and to evaluate whether SLNB should be performed during CPM. Methods: Ninety-four patients who underwent CPM between 2009 and 2018 were evaluated retrospectively. Occult breast carcinoma detection rate and approach to axilla were evaluated. Results: Occult invasive breast carcinoma was detected in three patients (3.2\%): two invasive ductal carcinoma and one multifocal invasive lobular carcinoma. Axillary staging was performed in second session. SLNB was performed in two patients and a micro-metastasis in one of four sentinel lymph nodes (SLN) was detected in one patient. Axillary lymph node dissection was performed in one patient in whom SLN was not detected. Conclusion: SLNB can be performed in patients with suspicious lesion in the absence of biopsy or in patients with high-risk of occult breast cancer (postmenopausal, high Gail score, lobular histology, multi-centric tumor, ipsilateral high-risk lesion)Item Management of Mechanical Problems of Totally Implantable Venous Catheters(MARMARA UNIV, INST HEALTH SCIENCES, 2020-01-01) Kara, Halil; Arikan, Akif Enes; Dulgeroglu, Onur; Uras, CihanObjective: Although the most common complications of totally implantable venous catheters(TIVC) are infection and thrombosis, mechanical complications can also affect the treatment and cause catheter removal. This study aimed to investigate mechanical complications of TIVC and prevention methods. Methods: Data of 983 procedures in 961patients who underwent TIVC implantation between 2010 and 2019 in AcibademMaslak, Bakirkoy, and Atakent Hospitals were retrospectively analyzed for mechanical complications. Results: Mechanical complications were encountered in 33(3.3\%) cases: 12(1.2\%) were detachment of TIVC, 8(0.8\%) occlusions, 5(0.5\%) pneumothorax, 1(0.1\%) hemothorax, 1(0.1\%) malposition, 1(0.1\%) extravasation, 2(0.2\%) TIVC rotation, 3(0.3\%) skin necrosis and extrusions. Conclusion: The catheter tip should be placed in distal superior vena cava, reservoir pocket must be sufficient in size, reservoir should be fixed to pectoral muscle or fascia at least two points with nonabsorbable sutures. Subcutaneous fatty tissue resection from reservoir pocket should be performed in obese patients. The nature of the withdrawn blood form Seldinger needle should be checked visually whether venous or not. Risk of pneumothorax and detachment can be reduced by inserting the catheter from 1/3 outer part of the clavicle during percutaneous technique. While complication rate can be reduced by peroperative fluoroscopy use, control X-ray should be taken in symptomatic patients, not routinely. Malposition can be seen in the peroperative period and can usually be corrected by good manipulation. Percutaneous transcatheter retrieval in addition to surgery is the gold standard treatment for detachment of TIVC. The most important factors in preventing complications are surgical experience and good care.