Publications by authors named "Ismet Sahinler"

9 Publications

  • Page 1 of 1

Role of vaginal brachytherapy boost following adjuvant external beam radiotherapy in cervical cancer: Turkish Society for Radiation Oncology Gynecologic Group Study (TROD 04-002).

Int J Gynecol Cancer 2021 Feb 30;31(2):185-193. Epub 2020 Sep 30.

Radiation Oncology, Ege University Faculty of Medicine, Izmir, Turkey.

Objective: There are a limited number of studies supporting vaginal brachytherapy boost to external beam radiotherapy in the adjuvant treatment of cervical cancer. The aim of this study was to assess the impact of the addition of vaginal brachytherapy boost to adjuvant external beam radiotherapy on oncological outcomes and toxicity in patients with cervical cancer.

Methods: Patients treated with post-operative external beam radiotherapy ± chemotherapy ± vaginal brachytherapy between January 2001 and January 2019 were retrospectively evaluated. The treatment outcomes and prognostic factors were analyzed in patients treated with external beam radiotherapy with or without vaginal brachytherapy.

Results: A total of 480 patients were included in the analysis. The median age was 51 years (range 42-60). At least two intermediate risk factors were observed in 51% of patients, while 49% had at least one high-risk factor. The patients in the external beam radiotherapy + vaginal brachytherapy group had worse prognostic factors than the external beam radiotherapy alone group. With a median follow-up time of 56 months (range 33-90), the 5-year overall survival rate was 82%. There was no difference in 5-year overall survival (87% vs 79%, p=0.11), recurrence-free survival (74% vs 71%, p=0.49), local recurrence-free survival (78% vs 76%, p=0.16), and distant metastasis-free survival (85% vs 76%, p=0.09) rates between treatment groups. There was no benefit of addition of vaginal brachytherapy to external beam radiotherapy in patients with positive surgical margins. In multivariate analysis, stage (overall survival and local recurrence-free survival), tumor histology (recurrence-free survival, local recurrence-free survival and distant metastasis-free survival), parametrial invasion (recurrence-free survival and distant metastasis-free survival), lymphovascular space invasion (recurrence-free survival), and lymph node metastasis (distant metastasis-free survival) were found as negative prognostic factors.

Conclusion: Adding vaginal brachytherapy boost to external beam radiotherapy did not provide any benefit in local control or survival in patients with cervical cancer.
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February 2021

Perspective of Turkish Medicine Students on Cancer, Cancer Treatments, Palliative Care, and Oncologists (ARES Study): a Study of the Palliative Care Working Committee of the Turkish Oncology Group (TOG).

J Cancer Educ 2020 02;35(1):69-75

Faculty of Medicine, Department of Medical Oncology, Mugla Sıtkı Kocman University, Mugla, Turkey.

Cancer is one of the most common causes of death all over the World (Rahib et al. in Cancer Res 74(11):2913-2921, 2014; Silbermann et al. in Ann Oncol 23(Suppl 3):iii15-iii28, 2012). It is crucial to diagnose this disease early by effective screening methods and also it is very important to acknowledge the community on various aspects of this disease such as the treatment methods and palliative care. Not only the oncologists but every medical doctor should be educated well in dealing with cancer patients. Previous studies suggested various opinions on the level of oncology education in medical schools (Pavlidis et al. in Ann Oncol 16(5):840-841, 2005). In this study, the perspectives of medical students on cancer, its treatment, palliative care, and the oncologists were analyzed in relation to their educational status. A multicenter survey analysis was performed on a total of 4224 medical school students that accepted to enter this study in Turkey. After the questions about the demographical characteristics of the students, their perspectives on the definition, diagnosis, screening, and treatment methods of cancer and their way of understanding metastatic disease as well as palliative care were analyzed. The questionnaire includes questions with answers and a scoring system of Likert type 5 (absolutely disagree = 1, completely agree = 5). In the last part of the questionnaire, there were some words to detect what the words "cancer" and "oncologist" meant for the students. The participant students were analyzed in two study groups; "group 1" (n = 1.255) were phases I and II students that had never attended an oncology lesson, and "group 2" (n = 2.969) were phases III to VI students that had attended oncology lessons in the medical school. SPSS v17 was used for the database and statistical analyses. A value of p < 0.05 was noted as statistically significant. Group 1 defined cancer as a contagious disease (p = 0.00025), they believed that early diagnosis was never possible (p = 0.042), all people with a diagnosis of cancer would certainly die (p = 0.044), and chemotherapy was not successful in a metastatic disease (p = 0.003) as compared to group 2. The rate of the students that believed gastric cancer screening was a part of the national screening policy was significantly more in group 1 than in group 2 (p = 0.00014). Group 2 had a higher anxiety level for themselves or their family members to become a cancer patient. Most of the students in both groups defined medical oncologists as warriors (57% in group 1 and 40% in group 2; p = 0.097), and cancer was reminding them of "death" (54% in group 1 and 48% in group 2; p = 0.102). This study suggested that oncology education was useful for the students' understanding of cancer and related issues; however, the level of oncology education should be improved in medical schools in Turkey. This would be helpful for medical doctors to cope with many aspects of cancer as a major health care problem in this country.
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February 2020

Ventricular ganglioneuroblastoma in an adult and successful treatment with radiotherapy.

Balkan Med J 2014 Jun 1;31(2):173-6. Epub 2014 Jun 1.

Department of Radiation Oncology, İstanbul University Cerrahpaşa Faculty of Medicine, İstanbul, Turkey.

Background: Ganglioneuroblastomas (GNBs) are rare embryonic neoplasms in the spectrum of neuroblastic tumours and 80% of cases occur in the first decade. In adults, GNBs are usually located in the retroperitoneum, mediastinum and neck but intracranial GNBs are extremely rare.

Case Report: A 34-year-old male applied to the Department of Neurology outpatient clinic with a two month history of headache and numbness in his legs. Detailed examinations and cranial CT were performed and showed a mass with a 5 cm diameter running from the third to the fourth ventricle. Referral to a neurosurgeon was performed for partial removal of the tumour, as the histological and immunohistochemical studies defined the diagnosis of GNB. Three months later, when the patient experienced dizziness, an MRI was performed, which showed a 4×3 cm ventricular mass, with hypointense characterisation in T1-weighted and hyperintense characteristics in T2-weighted and flair sequences. Afterwards, fractioned radiotherapy (54 Gy/30 fx) was chosen as the appropriate therapy. In the follow-up period, MRI was performed 3 months and 1 year after treatment, and revealed shrinkage of the tumour by at least 50%. Meanwhile the patient's post-irradiation course was favourable.

Conclusion: Data following the use of radiotherapy as treatment for intracranial GNB showing favourable results has been reported.
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June 2014

Significance of laryngeal edema after partial laryngectomy and radiotherapy in supraglottic cancer.

J Otolaryngol Head Neck Surg 2008 Oct;37(5):681-8

Department of Radiation Oncology, Cerrahpaşa Medical Faculty, Istanbul University, Istanbul, Turkey.

Objective: To evaluate the impact of the presence of laryngeal edema on outcome and the other potential prognostic factors in patients with supraglottic larynx carcinoma treated with radiotherapy after partial laryngectomy.

Design: A retrospective analysis.

Setting: Cerrahpaşa Medical Faculty, Istanbul University.

Methods: Seventy-nine patients with supraglottic carcinoma of the larynx were treated with radiotherapy after partial laryngectomy between January 1980 and July 2003. Neck dissection was not performed in 46 patients. The median follow-up time was 64 months.

Main Outcome Measures: The effect of laryngeal edema grade on local control, disease-free, and actuarial survival rates.

Results: The 5-year locoregional progression-free and overall survival rates were 86% and 75%, respectively. In univariate analysis, histologically positive neck disease reduced regional (p = .0045) and disease-free survival (p = .01). Patients with edema grade III-IV had lower local control (p = .0004), disease-free (p = .0034), and actuarial survival (p = .0041) rates. In the multivariate analysis, a significant negative association of laryngeal edema with local control (p = .012), disease-free survival (p = .002), and actuarial survival (p = .003) was found. Nodal status was a significant prognostic factor for disease-free survival (p = .027). Grade III-IV laryngeal edema was observed in 17 patients. Owing to laryngeal edema, tracheostomy dependence and total laryngectomy were required in three patients and one patient, respectively.

Conclusion: Radiotherapy after partial laryngectomy can be performed in patients with poor prognostic factors with reasonable complication rates. However, in the presence of grade III-IV laryngeal edema, tumour recurrence should be suspected, and these patients have to be managed with close follow-up and further evaluation to improve outcome.
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October 2008

Laparoscopic removal of a retained surgical instrument.

J Laparoendosc Adv Surg Tech A 2004 Aug;14(4):241-3

Department of Surgery, Cerrahpasa School of Medicine, Istanbul University, Istanbul, Turkey.

We report the case of a patient who underwent laparoscopic removal of a retained surgical spatula two months after a total abdominal hysterectomy and bilateral salpingo-oophorectomy for endometrial carcinoma. The foreign body was detected on a routine radiograph while the patient was been prepared for radiotherapy. Laparoscopy allowed us to explore the entire abdominal cavity for any potential complications of the retained instrument, and the procedure was completed successfully. This case demonstrates the feasibility of using a minimally invasive technique in the removal of a retained foreign body.
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August 2004

Endometrial clear cell carcinoma metastatic to the paranasal sinuses: a case report and review of the literature.

Gynecol Oncol 2004 Jul;94(1):232-4

Department of Pathology, Cerrahpasa School of Medicine, Istanbul University, Istanbul 34303, Turkey.

Background: Paranasal sinus metastasis following endometrial carcinoma is extremely rare and a reflection of disseminated disease.

Case: We report a case of a 72-year-old woman who presented ethmoid and sphenoid sinus metastasis, 14 months after total abdominal hysterectomy and bilateral salpingo-oophorectomy due to an endometrial clear cell carcinoma.

Conclusion: One should recognize the possibility of a metastatic disease to the sinuses in patients presenting with associated symptoms.
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July 2004

Tandem application with transvaginal ultrasound guidance.

Int J Radiat Oncol Biol Phys 2004 May;59(1):190-6

Department of Radiation Oncology, Istanbul University Cerrahpasa Medical School, Istanbul, Turkey.

Purpose: Intrauterine tandem placement can be difficult in brachytherapy for cervical cancer. A prospective study was planned to investigate transvaginal ultrasound (TVU) guidance for intrauterine tandem insertions in the treatment of cervix cancer.

Methods And Materials: Between January 1997 and January 2002, TVU was used after pelvic external beam radiotherapy in 48 cervical cancer patients with a high complication risk because the cervical canal orifice could not be identified and/or the patients could not undergo hysterometry. The TVU findings were graded as 1-4, with a higher number indicating greater difficulty in implantation. The tandem was inserted using the guidance of the TVU findings. Tandem application difficulties were graded in accordance with the number of implantation trials. The relations between tandem applicability and possible factors were analyzed.

Results: By TVU, the difficulties in tandem insertion were graded as Grade 1 in 5 cases, Grade 2 in 23 cases, Grade 3 in 17 cases, and Grade 4 in 3 cases. The tandem was inserted in 19 patients on the first try, 12 patients on the second try, 12 patients on the third try, and 2 patients on the fourth try. However, the cervical canal could not be opened in 3 patients. Factors such as median age, stage, chemotherapy, diameter of the tandem applicators, time between external beam radiotherapy and brachytherapy, and the rate of tumor regression were not statistically significant. The ultrasound grade (p = 0.02) and diameter of the tandem applicator (p = 0.007) were statistically significant. Perforation and sepsis were not observed.

Conclusion: TVU guidance before brachytherapy has a positive contributory effect in reducing the morbidity rate of patients considered high risk.
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May 2004

T-cell-rich B-cell lymphoma: a clinicopathologic study of 21 cases and comparison with 43 cases of diffuse large B-cell lymphoma.

Leuk Res 2004 Mar;28(3):229-36

Division of Hematopathology, Department of Pathology, Cerrahpasa Tip Fakultesi, Istanbul Universitesi, Patoloji Anabilim Dali, Istanbul 34303, Turkey.

Clinicopathologic features of 21 patients with T-cell-rich B-cell lymphoma (TCRBCL) were reviewed and compared to 43 patients with diffuse large B-cell lymphoma (DLBCL) to determine if there were distinguishing clinical characteristics and differences in response or survival to CHOP therapy. For the diagnosis of TCRBCL, the current WHO criteria was used. In all of our cases, the majority of cells are non-neoplastic T cells and <10% large neoplastic B cells are present. The initial pathologic diagnosis was nodular lymphocyte predominant Hodgkin's lymphoma (NLPHL) in two cases. Patients with TCRBCL were significantly younger (median: 46 years) and had a significantly higher incidence of B symptoms (62%), hepatomegaly (33%) and marrow infiltration (33%) at presentation when compared to DLBCL (P<0.03). The CR rate after treatment was 48% for TCRBCL patients versus 79% for the DLBCL (P<0.003). Although the CR rates in between the two groups are significant, the difference in 3 years survival rates in each CR groups was insignificant (80% versus 77%). The overall survival time in the two groups was 17 months. Event-free survival time in TCRBCL was 12 months, compared with 17 months in the DLBCL (P>0.05). The frequency of patients with TCRBCL achieving CR was 52.6% whereas that of patients with DLBCL was 79% (P<0.003). The TCRBCL 3 years event-free survival 48% and overall survival 64% were 63 and 72% for DLBCL, respectively.
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March 2004

Results and complications of high dose rate and low dose rate brachytherapy in carcinoma of the cervix: Cerrahpaşa experience.

Radiother Oncol 2003 Apr;67(1):97-105

Department of Radiation Oncology, Cerrahpaşa Medical School, Istanbul University, 34303, Istanbul, Turkey.

Purpose: To evaluate the results and complications of treatment with high dose rate (HDR) compared to low dose rate (LDR) brachytherapy in cervical carcinoma.

Methods: Three hundred and seventy patients who were treated with external irradiation and intracavitary brachytherapy and followed for more than 2 years between 1978 and 1998 have been recently updated. The low dose rate group consisted of 77 cases treated between 1978 and 1982 and HDR group consisted of 293 cases treated between 1982 and 1998. All patients first received external irradiation with 60Co or 9-18 MV photons and a median dose of 54 Gy was given in 6 weeks. In the LDR group, intracavitary treatment was given with Manchester applicators loaded with radium (30 mg) in an intrauterine tube and 20 mg in vaginal ovoids. The dose delivered to point A was on average 32 Gy in one application. In the HDR group, a total dose of 24 Gy was given to point A in three insertions 1 week apart. The dose rate was 0.62 Gy at point A.

Results: The 5-year pelvic control rate was found to be 73% in the HDR group, compared with 86% in the radium group for stage I cases. In stage IIB and IIIB cases, the rates were 68% and 45% for HDR and 65% and 53% for LDR, respectively. In all stages, there was no statistical difference in pelvic control and survival rates between the two groups. Overall incidence of late complications was found as 31.1% and 31.9% in HDR and LDR groups, respectively. The grade 2-4 late complication rate was 14% in the HDR group compared to 19% in the LDR group (P>0.05).

Conclusion: HDR brachytherapy in the management of the cervix appears to be a safe and efficacious approach. Pelvic control, survival and complications rates are quite similar when compared with LDR.
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April 2003