Yusuf Aytaç Tohma

Dr. Yusuf Aytaç Tohma


Research Focus & Metrics

Academic Career Length

12Years (2015-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 January 2020 in Journal of Gynecologic Oncology
Verified
Journal Article
Open access
KAKoray Aslan
Koray Aslan
MMMehmet Mutlu Meydanli
Mehmet Mutlu Meydanli
MÖMurat ÖZ
Murat ÖZ
YTYusuf Aytaç Tohma
Yusuf Aytaç Tohma
AHAli Haberal
Ali Haberal
AAAli Ayhan
Ali Ayhan
The aim of this study was to determine the prognostic value of lymph node ratio (LNR) in women with 2018 International Federation of Gynecology and Obstetrics stage IIIC cervical cancer. In this retrospective dual-institutional study, a total of 185 node-positive cervical cancer patients who had undergone radical hysterectomy with systematic pelvic and para-aortic lymphadenectomy were included. All of the patients received adjuvant chemoradiation after surgery. LNR was defined as the ratio of positive lymph nodes (LNs) to the total number of LNs removed. The patients were categorized into 2 groups according to LNR; LNR <0.05 and LNR ≥0.05. The prognostic value of LNR was evaluated with univariate log-rank tests and multivariate Cox regression models. A total of 138 patients (74.6%) had stage IIIC1 disease and 47 (25.4%) patients had stage IIIC2 disease. With a median follow-up period of 45.5 months (range 3-135 months), the 5-year disease-free survival (DFS) rate was 62.5% whereas the 5-year overall survival (OS) rate was 70.4% for the entire study population. The 5-year DFS rates for LNR <0.05 and LNR ≥0.05 were 78.2%, and 48.4%, respectively (p<0.001). Additionally, the 5-year OS rates for LNR <0.05 and LNR ≥0.05 were 80.6%, and 61.2%, respectively (p=0.007). On multivariate analysis, LNR ≥0.05 was associated with a worse DFS (hazard ratio [HR]=2.12; 95% confidence interval [CI]=1.15-3.90; p=0.015) and OS (HR=1.95; 95% CI=1.01-3.77; p=0.046) in women with stage IIIC cervical cancer. LNR ≥0.05 seems to be an independent prognostic factor for decreased DFS and OS in stage IIIC cervical carcinoma.

24 November 2017 in Gynecologic and Obstetric Investigation
Verified
Journal Article
Closed access
GÖGöğşen Önalan
Göğşen Önalan
YTYusuf Aytaç Tohma
Yusuf Aytaç Tohma
HZHulusi Bülent Zeyneloğlu
Hulusi Bülent Zeyneloğlu
Aims: To determine the effects of a tumor necrosis factor inhibitor (etanercept) on pregnancy outcomes in patients with endometrioma who were treated with assisted reproductive technology. Methods: Sixty-eight infertile patients who had endometrioma were included in our retrospective case-control study. We administered etanercept (Enbrel, 50 mg in 1 mL intramuscularly) to 19 patients on the second day of their previous menstrual cycle. All patients were treated with assisted reproductive technology. Pregnancy and live birth rates (LBR) were documented. Results: When all other parameters (age, body mass index, infertility) are supposed to be constant, the clinical pregnancy rate was significantly higher in patients who used etanercept in an antagonist protocol than in patients who did not use etanercept (χ2 = 5.547; p = 0.019) but LBR did not reach a statistical significance (χ2 = 3.179; p = 0.075). The use of etanercept had an OR of 4.17 (95% CI 1.23–14.14) compared with not using etanercept for clinical pregnancy rate. The use of etanercept increased the rate of pregnancy (χ2 = 6.55; p = 0.01). The pregnancy rate with the use of etanercept had an OR of 4.23 (95% CI 1.35–13.25) compared with patients who did not use etanercept. In the same way, the use of etanercept increased LBR twofold, but it is not significant in the border line (χ2 = 3.771; p = 0.052). Conclusions: Etanercept may be a new non-hormonal therapy that may be an adjunct to treatment of infertile women with endometrioma. However, the safety of etanercept on embryos and fetuses has not been fully clarified.

9 September 2019 in Journal of Obstetrics and Gynaecology
Verified
Journal Article
Closed access
HZHulusi Bulent Zeyneloglu
Hulusi Bulent Zeyneloglu
YTYusuf Aytaç Tohma
Yusuf Aytaç Tohma
GOGogsen Onalan
Gogsen Onalan
UMUtkun Moran
Utkun Moran
The aim of this study was to assess whether the dual administration of granulocyte colony-stimulating factor (G-CSF) increases the effect of only systemic administration in patients with RIF. This retrospective study included 111 infertile normoresponder cases with two or more unsuccessful in vitro fertilisation/intracytoplasmic sperm injection (IVF/ICSI) treatments, despite the transfer of good quality embryos. Patients were divided into three groups according to using G-CSF and administration route; Group 1 included patients who received subcutaneous (SC) G-CSF only (n = 38), Group 2 comprised patients who received both intrauterine (IU) and SC G-CSF (n = 39), the control group included patients who did not receive G-CSF who were matched by age (n = 34). The IU route of G-CSF was employed on ovulation triggering day. G-CSF was administered via an IU insemination catheter. SC injection was started on the day of oocyte retrieval and administered for 15 days at 100,000 IU/kg. Foetal cardiac activity (clinical pregnancy) was present in 50 patients (46.2%) after embryo transfer, with 20 patients included in SC group (Group 1) (52.6%), 25 in SC + IU group (Group 2) (64.1%) and 8 (23.5%) in control group and significant difference was observed between groups (p: .001). Pregnancy resulted in live birth in 43 patients (39.8%), with 13 patients belonging in Group 1 (34.2%), 25 in Group 2 (61.5%) and 8 (23.5%) in control group; significant differences were observed between groups (p: .001). In conclusion, our results showed that dual administration of G-CSF was significantly more effective that the SC only method.

1 May 2020 in Taiwanese Journal of Obstetrics and Gynecology
Verified
Journal Article
Open access
AAAli Ayhan
Ali Ayhan
YTYusuf Aytaç Tohma
Yusuf Aytaç Tohma
MTMehmet Tunc
Mehmet Tunc
The purpose of this study was to define the pregnancy and oncologic outcomes after fertility-sparing treatment of atypical hyperplasia (AH)/endometrial intraepithelial neoplasia (EIN) and early-stage endometrioid endometrial cancer (EEC). The retrospective cohort study included patients who had applied to Başkent University's Ankara Hospital between January 2007 and October 2018 with either AH/EIN (n: 27; Group A) or EEC (n: 30; Group B), and who had the desire to preserve their fertility. The medical records of all patients included in the study were reviewed retrospectively from the hospital records. There were 2 (7.4%) and 5 (16.7%) recurrences, whereby one patient from Group A and two patients from Group B underwent staging surgery. In Group A, 8 patients attempted pregnancy after their treatment and 4 of them (50%) became pregnant, while 3 of them (37.5%) had a live birth. In Group B, there were 17 patients who wanted to become pregnant following treatment of the disease; 8 of them (47%) became pregnant after treatment, 5 of them (16.6%) had a live birth, 1 experienced intrauterine exitus (at 21st gestational week, 350 g), and 2 currently have ongoing pregnancies. Hysteroscopic resection of visible lesions and full endometrial curettage prior to hormonal therapy as a fertility-preserving approach for women of reproductive age with endometrial malignancies can achieve promising oncologic and obstetric responses.

4 April 2019 in The Journal of Maternal-Fetal & Neonatal Medicine
Verified
Journal Article
Closed access
ECEser Colak
Eser Colak
EOEmel Ebru Ozcimen
Emel Ebru Ozcimen
MCMehmet Ufuk Ceran
Mehmet Ufuk Ceran
YTYusuf Aytaç Tohma
Yusuf Aytaç Tohma
SKSevsen Kulaksızoglu
Sevsen Kulaksızoglu
Objectives: Gestational diabetes mellitus (GDM) is defined as glucose intolerance detected for the first time in pregnancy or identified during pregnancy. Mean platelet volume (MPV) is a marker of activation and function of platelet. Several studies investigated the relation between MPV and GDM. The purpose of the present study is to predict GDM in the first trimester by using MPV value. Materials and methods: Two hundred pregnant women with GDM and 200 normal pregnant women were enrolled in the study. The first trimester MPV values of GDM and control groups were compared to predict GDM in the first trimester. Results: Women with GDM had higher MPV value compared with the control group (p < .001). The area under the receiver-operator curve was 0.70 for MPV. The cutoff value of MPV was 7.38 fl with 70% sensitivity and 60% specificity. According to the ages, MPV value was higher in GDM group in the individuals who were above 28-year-old (p < .001). Conclusion: MPV can be used to predict GDM in the first trimester.

1 July 2019 in Archives of Gynecology and Obstetrics
Verified
Journal Article
Closed access
PDF file
AAAli Ayhan
Ali Ayhan
KAKoray Aslan
Koray Aslan
MÖMurat ÖZ
Murat ÖZ
YTYusuf Aytaç Tohma
Yusuf Aytaç Tohma
EKEsra Kuşçu
Esra Kuşçu
MMMehmet Mutlu Meydanli
Mehmet Mutlu Meydanli