Tuna Karadağ

Prof. Dr. Tuna Karadağ


Research Focus & Metrics

Academic Career Length

13Years (2014-Present)

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

Representative Publications

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23 October 2014 in Asian Pacific Journal of Cancer Prevention
Verified
Journal Article
Open access
PDF file
TKTuna Karadağ
Tuna Karadağ
MKM. Kocak
M. Kocak
FKF. Kayikcioglu
F. Kayikcioglu
FEF. Ercan
F. Ercan
BDB. Dilbaz
B. Dilbaz
AHA. Haberal
A. Haberal
Risk for Malignant and Borderline Ovarian Neoplasms Following Basic Preoperative Evaluation by Ultrasonography, Ca125 Level and Age Adnexal masses;ultrasonography;risk of ovarian cancer;laparoscopic surgery; Objective: To verify the basic preoperative evaluation in the discrimination between benign and malignant adnexal masses in our clinical practice. Materials and Methods: Data were collected on the records of 636 women with adnexal masses who had undergone surgery either by open or endoscopic approaches. Those with obvious signs of malignancy, any history of cancer, emergency surgeries without basic evaluation were excluded. The preoperative features by age, ultrasound and serum Ca125 level were compared with final histopathological diagnosis at the four departments of the institution. These are the general gynecology (Group 1: exploratory laparotomy), the gynecologic endoscopy (Group 2: laparoscopy and adnexectomy), the gynecological oncology (Group 3: staging laparotomy) and the gynecologic endocrinology and infertility (Group 4: laparoscopy and cystectomy). Results: There were simple and complex cyst rates of 22.3% and 77.2%, respectively. There were 86.3% benign, 4.1% (n:20) borderline ovarian tumor (BOT) and 6.4% (n:48) malignant lesions. There were 3 BOT and 9 ovarian cancers in Group 1 and one BOT and two ovarian cancer in the Group 2. During the surgery, 15 BOT (75%) and 37 ovarian cancer (77%) were detected in the Group 3, only one BOT was encountered in the Group 4. The risk of rate of unsuspected borderline or focally invasive ovarian cancer significantly increased by age, size, complex morphology and Ca125 (95% CI, OR=2.72, OR=6.60, OR=6.66 and OR=4.69, respectively). Conclusions: Basic preoperative evaluation by comprehensive ultrasound imaging combined with age and Ca125 level has proved highly accurate for prediction of unexpected malignancies. Neither novel markers nor new imaging techniques provide better information that allow clinicians to assess the feasibility of the planned surgery; consequently, the risk of inadvertent cyst rupture during laparoscopy may be significantly decreased in selected cases.

5 September 2014 in Journal of Turkish Society of Obstetric and Gynecology
Verified
Journal Article
Open access
HÖHümeyra Öztürk
Hümeyra Öztürk
SESalim Erkaya
Salim Erkaya
SASibel Altınbaş
Sibel Altınbaş
TKTuna Karadağ
Tuna Karadağ
NTNazan Vanlı Tonyalı
Nazan Vanlı Tonyalı
DÖDemet Özkan
Demet Özkan
To investigate the relationship between gestational complications and high levels of maternal serum alfa-fetoprotein (MSAFP) and/or beta human chorionic gonadotropin (hCG) and to determine whether these markers are effective predictors of poor pregnancy outcomes. In this study, we enrolled a total of 679 women at 15-20 gestational weeks with MSAFP and hCG below or above 2.0 multiples of the median (MoM); of those, 200 women with normal MSAFP and hCG MoM formed the control group. Pre-eclampsia, intrauterine growth retardation (IUGR), preterm labor, preterm delivery, placental abruption, placenta previa, placenta accreta, preterm premature rupture of the membranes (PPROM), intrauterine fetal death, as well as neonatal and perinatal morbidity rates were evaluated. A significant relationship was found between adverse pregnancy outcomes and abnormal elevation of hCG and AFP levels in the second trimester. In cases of isolated elevation of hCG, preeclampsia and preterm labor/spontaneous preterm birth rate were slightly higher than in the control group (p=0.043, p=0.015), while IUGR, PPROM, placental abruption, and intrauterine fetal death rates were all similar (p=0.063, p=0.318, p=1.00, p=0.556). In case having an elevation in both markers, increased rate of obstetric complications have been observed. A significant relationship was found between the high levels of maternal serum AFP and hCG MoM and poor pregnancy outcomes like preeclampsia, IUGR, PPROM, intrauterine fetal death (p=0.003, p=0.001, p=0.040, p=0.006). To our knowledge, up to now, no definitive follow-up and treatment protocols have been established for patients at increased risk. In light of these findings, it is recommended to inform and educate patients about the most likely signs and symptoms of complications, to make more often antenatal visits, to perform more frequent ultrasound examination (fetal growth, AFI, etc.), NST, arterial/venous doppler, biophysical profile, and cervical length measurements in high-risk group.

1 September 2021 in The Journal of Maternal-Fetal & Neonatal Medicine
Verified
Journal Article
Closed access
RBRecep Bayraktar
Recep Bayraktar
BMBaris Mulayim
Baris Mulayim
ETEsra Tamburaci
Esra Tamburaci
CKCeyda Karadag
Ceyda Karadag
TKTuna Karadağ
Tuna Karadağ
The primary objective of the present study is to evaluate the effect of single-layer locked versus single-layer unlocked uterine closure techniques on the development of uterine niche. The secondar...

3 August 2017 in The Journal of Maternal-Fetal & Neonatal Medicine
Verified
Journal Article
Closed access
BDBetul Dundar
Betul Dundar
BDBurcu Dincgez
Burcu Dincgez
BBBurcu Aydin Boyama
Burcu Aydin Boyama
TKTuna Karadağ
Tuna Karadağ
GOGulten Ozgen
Gulten Ozgen
Purpose: Preeclampsia, in which insufficient trophoblastic invasion is thought to be one of the underlying mechanisms, is a common pregnancy disorder. Glycodelin is a regulator of immunosuppression, fertilization, implantation, and placentation. Because of its inhibitory effects on trophoblastic activity, trophoblast invasion is disturbed when its levels alter. We aimed to analyze serum glycodelin levels in preeclampsia and evaluate whether it correlates with the severity of disease. Methods: This is a prospective case–control study conducted in a research and training hospital between March and September 2016. In this study, a total of 55 preeclamptic and 65 healthy pregnants were included. Preeclamptic patients were divided into two subgroups: 25 severe and 30 mild. Maternal serum glycodelin levels were measured using enzyme-linked immunosorbent assay. Results: Glycodelin levels were higher in preeclamptic group as compared with controls (71.38 ± 22.78 versus 42.32 ± 12.28 ng/ml, p < .001). Also, it was higher in severe preeclampsia than the mild group (84.19 ± 24.58 versus 60.71 ± 14.4 ng/ml, p < .001). Glycodelin was positively correlated with systolic and diastolic blood pressures (r = 0.637 and r = 0.714, respectively, p < .001), aspartate and alanine aminotransferases (r = 0.369, p = .006 and r = 0.377, p = .005) and proteinuria (r = 0.342, p = .011). Moreover, it was correlated with birth weights and gestational age at delivery (r = −0.386, p = .004 and r = −0.394, p = .003, respectively). The role of glycodelin to diagnose preeclampsia was evaluated by receiver operating curve (ROC) curve. Area under the curve for glycodelin is 0.897 with p < .001. The sensitivity of glycodelin was 83.6% and the specificity was 80% at a threshold >53.64 ng/ml. Moreover, area under the curve for glycodelin to diagnose severe preeclampsia is 0.788 with p < .001. The sensitivity of glycodelin was 59% and the specificity was 93.3% at a threshold >83.97 ng/ml. Conclusion: Glycodelin may be a promising marker in predicting the presence and severity of preeclampsia.

6 September 2016 in Case Reports in Obstetrics and Gynecology
Verified
Journal Article
Open access
PDF file
TKTuna Karadağ
Tuna Karadağ
OEOnur Erol
Onur Erol
OOOzgur Ozdemir
Ozgur Ozdemir
AUAysel Uysal
Aysel Uysal
AAAhmet Sukru Alparslan
Ahmet Sukru Alparslan
MKMert Koroglu
Mert Koroglu
Uterine arteriovenous malformation (AVM) is defined as abnormal and nonfunctional connections between the uterine arteries and veins. Although the patients typically present with vaginal bleeding, some patients may experience life-threatening massive bleeding in some circumstances. The treatment of choice depends on the symptoms, age, desire for future fertility, and localization and size of the lesion; however, embolization of the uterine artery is the first choice in symptomatic AVM in patients at reproductive age with expectations of future fertility. We report a case of acquired AVM (after D/C) with an extensive lesion, which was successfully treated with bilateral uterine artery embolization (UAE).

1 June 2023 in Journal of Turkish Society of Obstetric and Gynecology
Verified
Journal Article
Closed access
STSezin Ateş Tatar
Sezin Ateş Tatar
TKTuna Karadağ
Tuna Karadağ
CKCeyda Karadag
Ceyda Karadag
GTGökçe Duranoğlu Turgut
Gökçe Duranoğlu Turgut
SKSelim Karataş
Selim Karataş
BMBarış Mülayim
Barış Mülayim
To compare the surgical and clinical results of traditional absorbable polyglactin 910 and barbed sutures in laparoscopic myomectomy. This single-center randomized study included 75 women who underwent laparoscopic myomectomy. The uterine wall defects were closed with a continuous conventional absorbable polyglactin 910 suture (Vicryl; Ethicon, Somerville, NJ, USA) in 41 women and with a unidirectional barbed suture (V-Loc 180; Covidien, Mansfield, MA, USA) in 34 women. The time required to suture the uterine wall defect was lower in the V-Loc group than in the Vicryl group (p=0.007). However, no significant difference was observed in the operative time between the two study groups. The intraoperative blood loss and need for postoperative blood transfusion were significantly lower in the barbed group than in the Vicryl group (p=0.018 and p=0.048, respectively). In laparoscopic myomectomy cases, the unidirectional barbed suture is more effective than the conventional absorbable suture. Barbed sutures facilitate the suturing process and reduce the time required to suture the uterine wall defect, blood loss, and the need for postoperative blood transfusion.