Browsing by Author "Tasdemir, Umit"

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Can complete blood count inflammatory parameters in epithelial ovarian cancer contribute to prognosis? - a survival analysis
(2019) Ceran, Mehmet Ufuk; Tasdemir, Umit; Colak, Eser; Gungor, Tayfun; 0000-0003-1923-2373; 0000-0002-8184-7531; 30744662
SubjectiveThe aim of the present study was to investigate the prognostic significance of preoperative complete blood count inflammatory markers in women operated for invasive Epithelial Ovarian Cancer (EOC).MethodTwo hundred forty four patients that underwent operation with the diagnosis of invasive EOC between 2006 and 2014 were included in the study. The date of operation, date of recurrence and final mortality evaluations were performed for survival analysis. The sensitivity, specificity, PPV and NPV were separately calculated with ROC analysis. Survival analysis was carried out with Kaplan Meier-Log Rank Method.ResultsFive-years overall survival rate was 56, 9% and 5-year disease-free survival (DFS) rate was 45,5%. Advanced disease stage, moderate-poor tumor differentiation, and the presence of recurrence were determined to have significant inverse relation at mean survival and 5-year survival rates. Neutrophil/lymphocyte ratio (NLR) and Platelet lymphocyte ratio (PLR) had prognostic effect on both DFS and overall survival based upon the cut-off values determined in the study (PLR=231, s36, NLR=3,83). Histopathological subtypes were not found to have any prognostic value. In correlation analysis, PLR and NLR had positive correlation with each other and negative correlation with overall survival.ConclusionsInflammatory markers such as NLR and PLR have independent prognostic value for women who undergo surgery for invasive EOC.
Evaluation of the tear parameters of ovulation induction patients in a short time period with anterior segment optical coherence tomography
(2020) Colak, Eser; Ulusoy, Mahmut Oguz; Ceran, Mehmet Ufuk; Tasdemir, Umit; Kal, Ali; Ozcimen, Emel Ebru; 33470279
Purpose: The effects of sex steroid hormones on tearparameters are known. Theaim of this studywas to examine the effects on tear parameters during exposure to high-dose sex steroids in a short period of time. Methods: Forty patients who were admitted to the infertility clinic of our hospital and planned to undergo ovulation induction with exogenous gonadotropins were included in our study. Prior tothe initiation of ovulation induction, the basal levels of estradiol were measured on day 3 of the menstrual cycle and ophthalmologic examinations were performed by the ophthalmology department of our hospital. The estradiol levels were-measured on the day ofovulation induction usinghuman chorionic gonadotropin and compared with basal estradiol; eye examinations were also repeated. Result: Forty women with reproductive period and average age of 33.3 +/- 4.2 years were included in this study. Basal levels of estradiol were significantly (p<0.001) higher after ovulation induction than before induction. The scores in the break-up timeand after induction were 6.2 +/- 2.8 sn and 8.4 +/- 1.4 sn, respectively. The values of Schirmer's test were 14.3 +/- 7.1 mm and 20.6 +/- 6.2 mm before and after induction, respectively. Both values were significantly higher after ovulation induction (p<0.001; p=0.001, respectively). Conclusion: We observed improvemet in tear function tests following the use of estradiol even for a limited time .The use of estradiol during menopause may improve dry eye symptoms in patients.
Incidence of unexpected leiomyosarcoma in a Turkish province: a retrospective multi-centre study in a low income setting
(2022) Tasdemir, Umit; Ceran, Mehmet Ufuk; Dirican, Aylin Onder; Akar, Serra; Celik, Cetin; Energin, Hasan; Gorkemli, Huseyin; Mammadova, Narmin; Colak, Eser; Ayhan, Ali; 0000-0003-1923-2373; 0000-0002-8184-7531; 35253591
The aim of the current study was to estimate the incidence of unexpected leiomyosarcoma (LMS) in patients who underwent surgery due to leiomyomas in Konya province, and to contribute to the literature discussing comparisons with similar studies. The digital archives of eight high-volume hospitals were studied for surgeries performed due to leiomyomas between January 2012 and January 2019, and leiomyosarcoma incidence was calculated based on the data obtained. Twenty-one patients in 3703 cases were found to have unexpected leiomyosarcoma, which means we can expect one leiomyosarcoma in 176 (0.56%) surgeries. Six more malignant tumours were detected among the remaining cases. Thus, our study estimated the incidence of unexpected leiomyosarcoma as 1/176 (0.56%), which is higher than most of the studies in the literature justifying the debate started by the FDA in 2014. As the tumour biology is not yet clear, and the incidence of unexpected leiomyosarcoma tends to be so high, the key focus must be to try to detect uterine leiomyosarcomas preoperatively for robust patient care.IMPACT STATEMENT What is already known on this subject? The incidence of unexpected leiomyosarcoma varies widely from 1/498 to 1/8300 depending on the study method and the type of procedure, and there is still controversy, even after the FDA statement that led to a major restriction in laparoscopic surgeries due to concerns about inadvertent morcellation of leiomyosarcomas. What do the results of this study add? To the best of our knowledge, the current study found the highest incidence of unexpected leiomyosarcoma, and consequently a serious evaluation of all patients undergoing surgery due to leiomyomas preoperatively considering a leiomyosarcoma candidate is recommended. What are the implications of these findings for clinical practice and/or further research? Studies on tumour biology and novel markers must be supported for accurate preoperative diagnosis of leiomyosarcoma.
Serum and placental periostin levels in women with early pregnancy loss
(2020) Eroglu, Semra; Colak, Eser; Erinanc, Ozgur Hilal; Ozdemir, Duygu; Ceran, Mehmet Ufuk; Tasdemir, Umit; Kulaksizoglu, Sevsen; Ozcimen, Emel Ebru; 0000-0003-1401-6356; 0000-0002-7613-2240; 0000-0002-9959-9433; 32460058; AAL-1268-2021; AAI-8932-2021
Objectives: Periostin is secreted from the placenta in the embryonic period and it is emphasized that it may be involved in endometrial implantation. In this study, we aimed to investigate periostin serum levels and placental tissue expression in first trimester pregnancy losses. Study design: In this prospective case-control study, 30 patients who underwent dilatation and curettage with first trimester spontaneous abortion (< 10 weeks of gestation) were included in the study group and 30 patients who had voluntary pregnancy termination (< 10 gestational weeks) were included in the control group. Serum samples collected from the study and control groups were analyzed usingenzyme-linkedimmunosorbent assay (ELISA), and trophoblastic and decidual tissues were examined using immunohistochemical staining with streptavidin-biotin-peroxidase techniques. Results: There were no significant differences between the groups in terms of age, gravida status, parity number, gestational week, and number of previous abortions. In the spontaneous abortion group, the serum level of periostin was significantly lower than in the voluntary termination group (6.56 +/- 4.16 pg/mLvs. 9.51 +/- 4.52 pg/mL, p = 0.03). There was no significant difference between the two groups in terms of periostin expression in decidual and trophoblastic tissue (p = 0.617, p = 0.274, p = 0.497). Conclusion: Periostin serum levels were significantly reduced in patients with spontaneous pregnancy loss. Periostin can be used as a predictive marker for the success of endometrial implantation.