Aleksandra Beleslin

Dr. Aleksandra Beleslin

Clinic for gynecology and obstetrics, University Clinical Center, Serbia, Belgrade, Belgrade, Beograd, Serbia
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Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

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

Representative Publications

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Journal Article
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Miljana Z JovandaricMiljana Z Jovandaric
Miljana Z Jovandaric
MDMilan Dokic
Milan Dokic
IBIvana R Babovic
Ivana R Babovic
SMSrboljub Milicevic
Srboljub Milicevic
JDJelena Dotlic
Jelena Dotlic
SBSandra Babic
Sandra Babic
Coronavirus disease (COVID-19) is an infectious disease caused by SARS-CoV-2. Elderly people, people with immunodeficiency, autoimmune and malignant diseases, as well as people with chronic diseases have a higher risk of developing more severe forms of the disease. Pregnant women and children can becomesick, although more often they are only the carriers of the virus. Recent studies have indicated that infants can also be infected by SARS-CoV-2 and develop a severe form of the disease with a fatal outcome. Acute Respiratory Distress Syndrome (ARDS) ina pregnant woman can affect the supply of oxygen to the fetus and initiate the mechanism of metabolic disorders of the fetus and newborn caused by asphyxia. The initial metabolic response of the newborn to the lack of oxygen in the tissues is the activation of anaerobic glycolysis in the tissues and an increase in the concentration of lactate and ketones. Lipid peroxidation, especially in nerve cells, is catalyzed by iron released from hemoglobin, transferrin and ferritin, whose release is induced by tissue acidosis and free oxygen radicals. Ferroptosis-inducing factors can directly or indirectly affect glutathione peroxidase through various pathways, resulting in a decrease in the antioxidant capacity and accumulation of lipid reactive oxygen species (ROS) in the cells, ultimately leading to oxidative cell stress, and finally, death. Conclusion: damage to the mitochondria as a result of lipid peroxidation caused by the COVID-19 disease can cause the death of a newborn and pregnant women as well as short time and long-time sequelae.
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12 April 2025 in Cancers
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ILIvana Likic Ladjevic
Ivana Likic Ladjevic
JDJelena Dotlic
Jelena Dotlic
KSKatarina Stefanovic
Katarina Stefanovic
BMBranislav Milosevic
Branislav Milosevic
ABAleksandra Beleslin
Aleksandra Beleslin
ZVZoran Vilendecic Zoran Vilendecic
Zoran Vilendecic Zoran Vilendecic
Background/Objectives: Due to the rarity and histological heterogeneity of non-epithelial ovarian cancers (NEOCs), monitoring their reproductive and oncological outcomes is challenging. Therefore, this study aimed to investigate the oncological and reproductive outcomes of patients with NEOCs treated with fertility-sparing surgery over the past 10 years at our tertiary referral university clinic. Methods: This retrospective study included all the NEOC patients diagnosed and treated with fertility-sparing surgery from 2010 to 2019. The patient demographic and clinical characteristics; data regarding the treatment andthe clinical, laboratory, and imaging findings during follow-up; and disease recurrences were recorded. In this study, the recurrence-free survival and the overall survival were the oncological outcomes. The reproductive outcomes were assessed as attempting and achieving pregnancy. Results: This study included 39 patients. The most frequent NEOCs were granulosa cell tumors (53.8%). The majority of the tumors were in the IA or IC1 stage. The initial therapy was generally a unilateral salpingo-oophorectomy (30.8%). Adjuvant chemotherapy was received by 48.7% of the patients. An NEOC recurrence was registered in 25.6% of the patients, mostly during the first two postoperative years. The recurrence-free survival was 76.92%. A regression analysis showed that amore advanced stage of NEOC was the most important predictor of disease recurrence. The overall survival rate was 87.2%, with a mean time to an adverse outcome of 23.01 +/−10.68 months. The regression analysis showed that better survival depended mostly on not having disease recurrence. After treatment, ten patients tried to conceive and seven succeeded. All the children were in good condition upon birth. Conclusions: Fertility-sparing treatment for NEOCs was proven as a safe and successful option in terms of both oncological and reproductive outcomes.

30 May 2025 in Diagnostics
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KSKatarina Stefanovic
Katarina Stefanovic
JDJelena Dotlic
Jelena Dotlic
IPIgor Pilic
Igor Pilic
BMBranislav Milosevic
Branislav Milosevic
OMOlga Mihaljevic
Olga Mihaljevic
ASAleksandar Stefanović
Aleksandar Stefanović
Background/Objectives: This study aimed to investigate oncologic and obstetrical outcomes of patients conservatively treated for atypical hyperplasia (AH), endometrial intraepithelial neoplasm (EIN), and early endometrial cancer (EC), as well as factors that influence these outcomes. Methods: This study included 87 women conservatively treated due to AH/EIN and well-differentiated endometrioid EC confined only to the endometrium during past 10 years. Therapy type, course, and duration were registered. The response totherapy after 12 months (remission vs. disease persisting or progressing) was considered as the oncologic outcome. All attempted and achieved pregnancies, along with conception method, gestational week, and delivery type, were recorded. The obstetrical outcomes were classified as adverse (miscarriage) or successful (healthy child). Results: All patients received LNG-IUD along with GnRHa and, if indicated, metformin. Complete remission was achieved in 74.7% of patients. The disease was persisting in 17.2% and progressing in 3.5% of patients, while recurrence was registered in 4.6% of patients. Radical surgery during follow-up was indicated in 15% of patients due to condition deterioration. Pregnancy was attempted by 29.9% of patients, out of which nine succeeded (34.6%). There were two early miscarriages, while the remaining seven pregnancies ended in a term delivery of a healthy child, mostly by planned cesarean section. The only predictor of long-term disease remission was malignancy-free control histological findings. Better therapy response and achieving remission in shorter time were predictors of good obstetrical outcome. Conclusions: This study proved the efficacy and safety of current protocols for AH/EIN/EC conservative treatment and indicated that adequate early (6-month) response totherapy has the most importance for long-term remission and pregnancy achievement.

1 January 2025 in Srpski arhiv za celokupno lekarstvo
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Journal Article
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ABAleksandra Beleslin
Aleksandra Beleslin
OMOlga Mihaljevic
Olga Mihaljevic
BMBranislav Milosevic
Branislav Milosevic
IPIgor Pilic
Igor Pilic
KSKatarina Stefanovic
Katarina Stefanovic
Introduction. Endometrial cancer is the most common gynecologic malignancy, and up to a quarter of cases are diagnosed in patients under the age of 45. Important risk factors that create a hyperestrogenic environment are obesity, polycystic ovary syndrome, insulin resistance, and type 2 diabetes mellitus. The standard treatment is classic hysterectomy with bilateral salpingo-oophorectomy; however, this treatment leads to loss of fertility, which poses an issue for younger patients who have not completed childbearing. Therefore, in certain cases, hormonal therapy could be used for early-stage endometrial adenocarcinoma to preserve fertility. Case outline. A 32-year-old female patient with insulin resistance presented with an ultrasonographic finding of an endometrial polyp, and after hysteroscopy and thorough evaluation, a well-differentiated adenocarcinoma of the endometrium (G1), FIGO stage IA, was verified. A conservative treatment was carried out with a levonorgestrel intrauterine device and a gonadotropin-releasing hormone (GnRH) analog for six months. After six months of therapy, there were no signs of malignant cells, and she conceived naturally. Eventually, the patient delivered a healthy baby. Conclusion. Insulin resistance is a potentially modifiable risk factor and thus important in cases of fertility preservation treatment. Management could reduce cancer risk and improve reproductive outcomes. Further studies are needed to better understand the impact of insulin resistance treatment on the success of fertility- sparing management and the rate of recurrence.

17 May 2024 in Medicina
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LJLjubisa Jovanovic
Ljubisa Jovanovic
SMSvetlana Milenković
Svetlana Milenković
LALuka Andrić
Luka Andrić
RSRadomir Stefanović
Radomir Stefanović
BMBranislav Milosevic
Branislav Milosevic
MDMilan Dokic
Milan Dokic
Background and Objectives: Mutations in succinate dehydrogenase (SDH) and fumarate hydratase (FH) give rise to various familial cancer syndromes, with these alterations being characteristic of certain types of histomorphologically specific leiomyomas that hold significant predictive value. Materials and Methods: This study presents two cases of uterine leiomyomas exhibiting rare histomorphological and genetic characteristics, which are crucial for prognosis and further treatment. Results: Distinct histopathological features such as marked nuclear atypia, intracellular eosinophilic globules, and abnormal intratumoral vessels raise suspicion for specific leiomyoma subtypes, which carry predictive significance for additional hereditary cancer syndromes. Immunohistochemical analysis confirmed FH/SDH deficiency in both patients, who underwent careful follow-up. Conclusions: This study describes two cases involving unusual leiomyomas, the histopathological characteristics of which may easily go unrecognized. These features hold predictive significance because their specific mutations point to additional hereditary cancer syndromes, highlighting the need for further examinations.

1 January 2024 in Srpski arhiv za celokupno lekarstvo
Verified
Journal Article
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ILIvana Likic Ladjevic
Ivana Likic Ladjevic
MPMilos Petronijevic
Milos Petronijevic
SVSvetlana M. Vrzić-Petronijević
Svetlana M. Vrzić-Petronijević
ABAleksandra Beleslin
Aleksandra Beleslin
SDStefan Dugalic
Stefan Dugalic
Introduction. There are three groups of disorders during pregnancy: disorders specific for pregnancy that resolve spontaneously or soon after delivery, acute hepatic disorders coinciding with pregnancy and chronic disorders. Drug-induced liver disease prevails among women and it is estimated to be a leading cause of acute liver injury. Drug-induced hepatitis is rare in pregnancy with only a few cases reported in the literature. Alpha-methyldopa is one of the commonly used drugs in pregnancy that could cause hepatotoxicity with different clinical presentations and possible adverse effects on normal course of pregnancy. Case Outline. We reported a rare case of hepatotoxicity caused by alpha-methyldopa in 26 gestational weeks pregnancy in a 35-year-old patient admitted because of jaundice and elevated liver function tests. She had been using antihypertensive drug, alpha-methyldopa, from 12th gestational week, and no other medication or supplementation was recorded. Ultrasound of abdomen excluded obstruction or any other abnormalities. Autoimmune panel was done. Biochemical analysis were indicative of toxic acute liver injury caused by alpha-methyldopa according to values of transaminase. After 13 days, patient was discharged recovered from the hospital. Conclusion. Diagnosis of alpha-methyldopa hepatotoxicity is challenging since the low incidence, unpredictability, diverse symptomatology and absence of specific biomarkers. That is why timely diagnosis is crucial for the well-being of both future mother and child.