Person: OYUCU ORHAN, SİBEL
Loading...
Email Address
Birth Date
Research Projects
Organizational Units
Job Title
Last Name
OYUCU ORHAN
First Name
SİBEL
Name
6 results
Search Results
Now showing 1 - 6 of 6
Publication Treatment efficacy of ribociclib or palbociclib plus letrozole in hormone receptor-positive/HER2-negative metastatic breast cancer(Future Medicine Ltd, 2023-05-03) Kahraman, Seda; Erul, Enes; Seyyar, Mustafa; Gumusay, Ozge; Bayram, Ertugrul; Demirel, Burcin Cakan; Acar, Omer; Aksoy, Sercan; Baytemur, Naziyet Kose; Sahin, Elif; Cabuk, Devrim; Basaran, Gul; Paydas, Semra; Yaren, Arzu; Guven, Deniz Can; Erdogan, Atike Pinar; Demirci, Umut; Yasar, Alper; Bayoglu, Ibrahim Vedat; Hizal, Mutlu; Gulbagci, Burcu; Paksoy, Nail; Davarci, Sena Ece; Yilmaz, Funda; Dogan, Ozlem; Orhan, Sibel Oyucu; Kayikcioglu, Erkan; Aytac, Ali; Keskinkilic, Merve; Mocan, Eda Eylemer; Unal, Olcun Umit; Aydin, Esra; Yucel, Hakan; Isik, Deniz; Eren, Onder; Uluc, Basak Oyan; Ozcelik, Melike; Hacibekiroglu, Ilhan; Aydiner, Adnan; Demir, Hacer; Oksuzoglu, Berna; Cilbir, Ebru; Cubukcu, Erdem; Cetin, Bulent; Oktay, Esin; Erol, Cihan; Okutur, Sadi Kerem; Yildirim, Nilgun; Alkan, Ali; Selcukbiricik, Fatih; Aksoy, Asude; Karakas, Yusuf; Ozkanli, Gulhan; Duman, Berna Bozkurt; Aydin, Dincer; Dulgar, Ozgecan; Er, Muhammed Muhiddin; Teker, Fatih; Yavuzsen, Tugba; Aykan, Musa Baris; Inal, Ali; Iriagac, Yakup; Kalkan, Nurhan Onal; Keser, Murat; Sakalar, Teoman; Menekse, Serkan; Kut, Engin; Bilgin, Burak; Karaoglanoglu, Muge; Sunar, Veli; Ozdemir, Ozlem; Turhal, Nazim Serdar; Karadurmus, Nuri; Yalcin, Bulent; Sendur, Mehmet Ali Nahit; OYUCU ORHAN, SİBEL; ÇUBUKÇU, ERDEM; Tıp Fakültesi; Onkoloji Ana Bilim Dalı; 0000-0001-8217-3471 ; ETP-1691-2022; AAJ-8314-2021Background: Ribociclib, palbociclib and abemaciclib are currently approved CDK4/6 inhibitors along with aromatase inhibitors as the first-line standard-of-care for patients with hormone receptor-positive, HER2-negative metastatic breast cancer. Methods: The authors report retrospective real-life data for 600 patients with estrogen receptor- and/or progesterone receptor-positive and HER2-negative metastatic breast cancer who were treated with ribociclib and palbociclib in combination with letrozole. Results & conclusion: The results demonstrated that the combination of palbociclib or ribociclib with letrozole has similar progression-free survival and overall survival benefit in real life for the patient group with similar clinical features. Specifically, endocrine sensitivity may be a factor to be considered in the treatment preference.Publication The ki-67 proliferation index predicts recurrence-free survival in patients with dermatofibrosarcoma protuberans(Assoc Basic Medical Sci Federation Bosnia & Herzegovina Sarajevo, 2021-01-01) Tanriverdi, Ozgur; Ozsen, Mine; ÖZŞEN, MİNE; Deligonul, Adem; DELİGÖNÜL, ADEM; Yazici, Serkan; YAZİCİ, SERKAN; Cetintas, Sibel Kahraman; Yalcinkaya, Ulviye; YALÇINKAYA, ÜLVİYE; Sahin, Ahmet Bilgehan; ŞAHİN, AHMET BİLGEHAN; Orhan, Sibel Oyucu; OYUCU ORHAN, SİBEL; Ocak, Birol; OCAK, BİROL; Evrensel, Turkkan; EVRENSEL, TÜRKKAN; Kahveci, Ramazan; KAHVECİ, RAMAZAN; Cubukcu, Erdem; ÇUBUKÇU, ERDEM; Tıp Fakültesi; Onkoloji Ana Bilim Dalı; 0000-0001-6407-0962; 0000-0002-5771-7649; 0000-0002-7846-0870; 0000-0002-0598-7284; 0000-0001-7537-1699; AAJ-8314-2021; AEC-2238-2022; AAM-4927-2020; M-2172-2015Dermatofibrosarcoma protuberans (DFSP) is an uncommon soft tissue sarcoma that originates from the dermis or subcutaneous tissue in the skin. While its prognosis is generally favorable, disease recurrence is relatively frequent. Since morbidity after repeated surgery may be significant, an optimized prediction of recurrence-free survival (RFS) has the potential to improve current management strategies. The purpose of this study was to investigate the prognostic value of the Ki-67 proliferation index with respect to RFS in patients with DFSP We retrospectively analyzed data from 45 patients with DFSP. We calculated the Ki-67 proliferation index as the percentage of immunostained nuclei among the total number of tumor cell nuclei regardless of the intensity of immunostaining. We constructed univariate and multivariate Cox proportional hazards regression models to identify predictors of RFS. Among the 45 patients included in the study, 8 developed local recurrences and 2 had lung metastases (median follow-up: 95.o months; range: 5.2-412.4 months). The RFS rates at 60, 120, and 240 months of follow-up were 83.8%, 76.2%, and 65.3%, respectively. The median Ki-67 proliferation index was 14%. Notably, we identified the Ki-67 proliferation index as the only independent predictor for RFS in multivariate Cox proportional hazards regression analysis (hazard ratio = 1.106, 95% confidence interval = 1.019-1.200, p = 0.016). In summary, our results highlight the potential usefulness of the Ki-67 proliferation index for facilitating the identification of patients with DFSP at a higher risk of developing disease recurrences.Publication Platin-based chemotherapy does not improve survival in patients with non-metastatic resected typical carcinoid tumors(Spandidos Publ Ltd, 2022-10-01) Şahin, Ahmet Bilgehan; Melek, Hüseyin; Ocak, Birol; Oyucu Orhan, Sibel; Erkan, Buket; Caner, Burcu; Deligönül, Adem; Çubukcu, Erdem; Bayram, Ahmet Sami; Akyıldız, Elif Ülker; Evrensel, Türkkan; ŞAHİN, AHMET BİLGEHAN; MELEK, HÜSEYİN; OCAK, BİROL; OYUCU ORHAN, SİBEL; ERKAN ÖZMARASALI, BUKET; CANER, BURCU; DELİGÖNÜL, ADEM; ÇUBUKÇU, ERDEM; BAYRAM, AHMET SAMİ; AKYILDIZ, ELİF ÜLKER; EVRENSEL, TÜRKKAN; Tıp Fakültesi; Tıbbi Onkoloji Ana Bilim Dalı; 0000-0002-7846-0870; 0000-0003-0684-0900; 0000-0003-1822-8153; 0000-0001-8217-3471; 0000-0003-1591-3323; AAM-4927-2020; AAI-5039-2021; AEC-2238-2022; AAJ-8314-2021; CPN-8681-2022; HJH-6371-2023; ESM-4544-2022; ETP-1691-2022; ABB-7580-2020; ELN-4128-2022; EXZ-0745-2022Chemotherapy is controversial in non-metastatic typical carcinoid (TC) tumors. Therefore, it was aimed to evaluate the impact of platin-based chemotherapy on the survival of patients with lung TC. The medical records of patients who underwent surgical resection for non-metastatic TC from 2002 to 2020 at our institution were retrospectively reviewed. Multivariate regression analysis was performed for chemotherapy and prognostic factors in disease-free survival (DFS) in 72 patients. The pathological stages of patients were as follows: 73.6% of the patients were in stage I, 15.3% in stage II and 11.1% in stage III. A total of 5 patients (6.9%) received platin-based chemotherapy and 6 patients (8.3%) had recurrences. The DFS rates at 12, 36 and 60 months were 98.5, 95.1 and 92.5%, respectively. Log-rank testing showed that patients who received chemotherapy and had stage III disease had shorter DFS (P=0.021 for chemotherapy and P<0.001 for stage). However, multivariate analysis revealed that the pathological stage was the only statistically significant factor affecting DFS (P=0.016). Platin-based chemotherapy did not improve DFS, and the eighth edition of TNM (tumor, nodes, metastases) staging did have prognostic value for patients with non-metastatic TC. Although resection has satisfying long-term outcomes, studies on new agents are needed to decrease the recurrence rate, particularly in patients with stage III disease.Publication Chemo-immunotherapy with atezolizumab in extensive-stage small-cell lung cancer; single-center experience(Akad Doktorlar Yayınevi, 2020-01-01) Şahin, Ahmet Bilgehan; Çubukcu, Erdem; Ocak, Birol; Deligönül, Adem; Kaçan, Turgut; Orhan, Sibel Oyucu; Evrensel, Türkkan; ŞAHİN, AHMET BİLGEHAN; ÇUBUKÇU, ERDEM; OCAK, BİROL; DELİGÖNÜL, ADEM; OYUCU ORHAN, SİBEL; EVRENSEL, TÜRKKAN; Tıp Fakültesi; Tıbbi Onkoloji Ana Bilim Dalı; 0000-0002-7846-0870; 0000-0001-7537-1699; 0000-0001-8217-3471; 0000-0002-9732-5340; AAJ-8314-2021; AAJ-1027-2021; AAM-4927-2020; ETP-1691-2022; HHA-1866-2022; ESM-4544-2022Chemo-immunotherapy (CIT) with platin, etoposide and monoclonal antibodies targeting the PD-1/PDL-1 pathway has recently improved survival in extensive-stage small-cell lung cancer (SCLC) after decades. We aimed to investigate the efficacy and safety of CIT with atezolizumab in extensive-stage SCLC in chemotherapy naive patients. Eleven patients who were treated and followed in our center were included in this retrospective observational study. All the patients received carboplatin, etoposide and atezolizumab in the induction phase and atezolizumab in the maintenance phase. The Kaplan-Meier test was used to determine progression-free survival (PFS) and overall survival (OS), and the effects of the sites of metastasis were analyzed using the log-rank test. The median age was 69.9 years, and 81.8% were male. The median number of CIT and total atezolizumab cycles was 4 and 7, respectively. 63.6% received maintenance therapy. Median PFS was 5.2 months (95% CI: 3.4-6.9), and median OS was 11.3 months (95% CI: 1.0-21.5). The overall response rate was 63.6%. There was no significant difference between patients with and without liver metastasis in terms of PFS and OS. We observed toxicity higher than grade 2 in more than half of the patients, and hematological toxicities were prominent. CIT with carboplatin, etoposide and atezolizumab is efficient and safe in extensive-stage SCLC considering the PFS, OS, response rates, 12-month survival rate, and side effects. The progression of liver lesions was remarkable. Cranial and thoracic radiation are issues that should be discussed in the future with data from clinical studies.Publication The impact of ki-67 index, squamous differentiation, and several clinicopathologic parameters on the recurrence of low and intermediate-risk endometrial cancer(Assoc Basic Medical Sci Federation Bosnia & Herzegovina Sarajevo, 2021-01-01) Ocak, Birol; Atalay, Fatma Oz; Sahin, Ahmet Bilgehan; Ozsen, Mine; Dakiki, Bahar; Ture, Seray; Mesohorli, Merve; Odman, Hikmet Utku; Tanriverdi, Ozgur; Ocakoglu, Gokhan; Bayrak, Mehmet; Ozan, Hakan; Demiroz, Candan; Sali, Seda; Orhan, Sibel Oyucu; Deligönül, Adem; Çubukcu, Erdem; Evrensel, Turkkan; Ocak, Birol; OCAK, BİROL; Sahin, Ahmet Bilgehan; ŞAHİN, AHMET BİLGEHAN; Atalay, Fatma Oz; ÖZ ATALAY, FATMA; Ozsen, Mine; ÖZŞEN, MİNE; Dakiki, Bahar; DAKİKİ KORUCU, BAHAR; Ture, Seray; TÜRE AYDIN, SERAY; Mesohorli, Merve; Odman, Hikmet Utku; Ocakoglu, Gokhan; OCAKOĞLU, GÖKHAN; Bayrak, Mehmet; Ozan, Hakan; OZAN, HAKAN; Demiroz, Candan; DEMİRÖZ ABAKAY, CANDAN; Sali, Seda; SALİ, SEDA; Orhan, Sibel Oyucu; OYUCU ORHAN, SİBEL; Deligonul, Adem; DELİGÖNÜL, ADEM; Cubukcu, Erdem; ÇUBUKÇU, ERDEM; Evrensel, Turkkan; EVRENSEL, TÜRKKAN; Tıp Fakültesi; Onkoloji Ana Bilim Dalı; 0000-0001-7537-1699; 0000-0002-7188-6115; 0000-0002-7846-0870; 0000-0002-5771-7649; 0000-0001-9255-2475; 0000-0002-1114-6051; 0000-0003-1600-333X; AEC-2238-2022; ABA-2897-2021; AAH-5180-2021; AAM-4927-2020; AAJ-8314-2021Endometrial endometrioid carcinoma (EEC) represents approximately 75-80% of endometrial carcinoma cases. Three hundred and thirty-six patients with EEC followed-up in the authors' medical center between 2010 and 2018 were included in our study. Two hundred and seventy-two low and intermediate EEC patients were identified using the European Society for Medical Oncology criteria and confirmed by histopathological examination. Recurrence was reported in 17 of these patients. The study group consisted of patients with relapse. A control group of 51 patients was formed at a ratio of 3:1 according to age, stage, and grade, similar to that in the study group. Of the 17 patients with recurrent disease, 13 patients (76.5%) were Stage 1A, and 4 patients (23.5%) were Stage 1B. No significant difference was found in age, stage, and grade between the case and control groups (p > 0.05). Body mass index, parity, tumor size, lower uterine segment involvement, squamous differentiation (SqD), and Ki-67 index with p<0.25 in the univariate logistic regression analysis were included in the multivariate analysis. Ki-67 was statistically significant in multivariate analysis (p = 0.018); however, there was no statistical significance in SqD and other parameters. Our data suggest that the Ki-67 index rather than SqD needs to be assessed for recurrence in patients with low- and intermediate-risk EEC.Publication Efficacy of chemotherapeutics on classic and non-classic kaposi sarcoma: A single-center retrospective real-world study(Assoc Basic Medical Sci Federation Bosnia & Herzegovina Sarajevo, 2021-01-01) Orhan, Sibel Oyucu; OYUCU ORHAN, SİBEL; Sahin, Ahmet Bilgehan; ŞAHİN, AHMET BİLGEHAN; Çubukcu, Erdem; ÇUBUKÇU, ERDEM; Deligonul, Adem; DELİGÖNÜL, ADEM; Ocak, Birol; OCAK, BİROL; Orhan, Bedrettin; ORHAN, BEDRETTİN; Evrensel, Turkkan; EVRENSEL, TÜRKKAN; Tıp Fakültesi; Onkoloji Ana Bilim Dalı; 0000-0002-7846-0870; 0000-0001-7537-1699; ACW-2157-2022; AAJ-8314-2021; AEC-2238-2022; AAM-4927-2020Kaposi sarcoma (KS) is a rare disease, and especially for classic KS, a gap exists in the literature about which chemotherapeutics should be given. Here we present our institutional data on the demographic characteristics, treatment, and treatment efficacy in 16 patients with KS treated with chemotherapy. We retrospectively analyzed the demographic and clinical characteristics of and the chemotherapeutic agents administered to the 16 patients with KS diagnosed in our center based on the medical records obtained. The median age, gender, KS type, involved site, cytotoxic agents administered, progression-free survival (PFS), overall survival (OS), objective response rate (ORR), disease control rate (DCR), and safety profiles of the patients were evaluated. The median age at disease onset was 61.07 years (range, 39.4-85.8 years). Among the patients, one had immunosuppression-related KS, four had acquired immune deficiency syndrome-related KS, and 11 had classic KS. Regarding the first-line cytotoxic therapy, seven patients received pegylated liposomal doxorubicin (PLD), six received paclitaxel, two received oral etoposide, and one received the doxorubicin, bleomycin, and vincristine regimen. The Kaplan-Meier analysis showed that the PFS was 39.9 months (95% confidence interval (CI), 7.7-72.0). In the first-line setting, a significant difference in PFS was observed between the PLD-and paclitaxel-treated groups (unreached vs. 12.8 months; p = 0.033). The OS was 66.1 months (95% CI, 30.2-102.0). The ORR and DCR of the 16 patients were 43.8%, and 81.3%, respectively. No grade 3 or 4 toxicity was observed. This retrospective study showed that among the most preferred chemotherapeutic agents, PLD seems better than paclitaxel in terms of PFS and response rates, and it showed a good safety profile in patients with KS.