Eleftherios Zachariou

Dr. Eleftherios Zachariou

orcid

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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13 June 2025 in Biomedicines
Verified
Journal Article
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Dimitrios PapageorgiouDimitrios Papageorgiou
Dimitrios Papageorgiou
ISIOAKEIM SAPANTZOGLOU
IOAKEIM SAPANTZOGLOU
IPIoannis Prokopakis
Ioannis Prokopakis
EZEleftherios Zachariou
Eleftherios Zachariou
The most frequent form of ectopic pregnancy, known as tubal pregnancy, leads to a dangerous situation where the fertilized ovum implants inside a fallopian tube, which can result in tubal rupture and severe bleeding. The purpose of this narrative review is to evaluate all existing data regarding epidemiology, risk factors, pathophysiology, clinical presentation, diagnosis, and management of tubal ectopic pregnancy in order to provide a comprehensive understanding of this common yet difficult clinical condition. Prior ectopic pregnancy, together with tubal pathology and assisted reproduction, represent the main risk factors for this condition. The diagnosis relies on serial β-hCG tests combined with transvaginal ultrasonography, but laparoscopy serves as the diagnostic tool for cases with uncertain results. The treatment plan depends on the fallopian tube integrity, along with the patient’s hemodynamic condition. Patients with unruptured pregnancies who are hemodynamically stable receive methotrexate treatment as the preferred option, but surgical intervention with salpingectomy or salpingostomy becomes necessary in case of tubal rupture or when medical treatment fails. The development of laparoscopic procedures has led to better results and improved possibilities for fertility preservation. The psychological effects on patients require both counseling and follow-up care. Early detection, along with personalized management, helps decrease maternal complications and optimize reproductive outcomes.

22 June 2025 in Biomedicines
Verified
Journal Article
Open access
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Dimitrios PapageorgiouDimitrios Papageorgiou
Dimitrios Papageorgiou
Galateia LioutaGalateia Liouta
Galateia Liouta
EPEvangelia Pliakou
Evangelia Pliakou
EZEleftherios Zachariou
Eleftherios Zachariou
ISIOAKEIM SAPANTZOGLOU
IOAKEIM SAPANTZOGLOU
EKEmmanuel Kontomanolis
Emmanuel Kontomanolis
Ovarian cancer is the most lethal gynecologic malignancy, which causes 313,959 new cases and 207,252 deaths worldwide annually. The lack of specific symptoms, together with no effective screening tools, results in 75% of patients receiving their diagnosis at an advanced stage. The combination of cytoreductive surgery with platinum-based chemotherapy plays a pivotal role in the treatment of advanced epithelial ovarian cancer, but patients still experience poor long-term survival because of frequent relapses and chemotherapy resistance. The treatment landscape has evolved because bevacizumab and Poly-ADP Ribose Polymerase inhibitors now serve as frontline and maintenance therapies for homologous recombination-deficient tumors. Treatment decisions for recurrent disease depend on platinum sensitivity assessment, which determines the appropriate therapeutic approach, while targeted agents deliver significant benefits to specific patient groups. The development of antibody-drug conjugates such as mirvetuximab soravtansine and immunotherapy, including checkpoint inhibitors and cancer vaccines, demonstrates promising investigative potential. The precision of therapy improves through the use of emerging biomarkers and molecular profiling techniques. The future management of this disease may change because of innovative approaches that include adoptive cell therapy, cytokine therapy, and oncolytic viruses. The progress made in ovarian cancer treatment still faces challenges when it comes to drug resistance, survival improvement, and life quality preservation. The development of translational research alongside clinical trials remains essential to bridge treatment gaps while creating personalized therapies based on molecular and clinical tumor characteristics.

30 June 2023 in Medicina
Verified
Journal Article
Open access
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ISIOAKEIM SAPANTZOGLOU
IOAKEIM SAPANTZOGLOU
ARAngeliki Rouvalis
Angeliki Rouvalis
AKAntonios Koutras
Antonios Koutras
MCMaria Ioanna Chatziioannou
Maria Ioanna Chatziioannou
IPIoannis Prokopakis
Ioannis Prokopakis
KPKALLIOPI PAPPA
KALLIOPI PAPPA
Twin pregnancies demonstrate a 2–3-fold higher chance of developing PE compared to singletons, and recent evidence has demonstrated that the sFLT1/PIGF ratio is strongly associated with PE, adverse pregnancy outcomes, as well as imminent deliveries due to PE complications. The primary objective of this systematic review was to summarise the available data on the levels of sFLT1, PlGF and their ratios in twin pregnancies and to investigate their association with the development of PE, adverse pregnancy outcomes and the timing of the delivery. A systematic search of Ovid Embase, Web of Science, Science Direct, PubMed, Ovid Medline, Google Scholar and CINAHL was carried out. sFLT1 levels and the sFLT1/PIGF ratio appeared higher in twins compared to singleton pregnancies, especially in the third trimester, while PlGF levels appeared higher up until the third trimester, with their values showing no difference or being even lower than in singletons thereafter. The sFLT1/PIGF ratio has been reported to be an independent marker of adverse outcomes related to pre-eclampsia and is associated with the mean time until delivery in an inverse manner. Further research is required in order to establish the optimal sFLT1/PIGF cut-off values and to stratify the risk of adverse outcomes in twin pregnancies.

26 August 2025 in Journal of Clinical Medicine
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Journal Article
Open access
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EKEmmanuel Kontomanolis
Emmanuel Kontomanolis
IPIoannis Prokopakis
Ioannis Prokopakis
AKAntonios Koutras
Antonios Koutras
EAEmmanouil Andreou
Emmanouil Andreou
DMDionysios Metaxas
Dionysios Metaxas
PPParaskevas Perros
Paraskevas Perros
Background: Pregnancy-Related Acute kidney injury (PRAKI) is a critical complication of pregnancy, defined by the sudden deterioration in renal function during gestation or within the initial six weeks postpartum. Pregnancy is thought to increase the risk of acute kidney injury (AKI) by 51%. This is linked to the anatomical alterations that occur during pregnancy and special conditions, such as preeclampsia/eclampsia. PRAKI’s epidemiology and outcome vary between developed and developing nations. PRAKI is an uncommon entity in high-income countries; however, its incidence has recently increased. The aim of this systematic review is to evaluate the maternal and perinatal outcomes and risk factors affecting pregnancies affected by AKI. Methods: Comprehensive research was performed in PubMed/Medline, Scopus, and Google Scholar electronic databases from 2015 up to January 2025, using the terms AKI, PRAKI, sepsis, preeclampsia/eclampsia, liver enzymes, low platelet count (HELLP) syndrome, and pregnancy. After a thorough assessment, 25 full-text articles were obtained. Results: Our results revealed that preeclampsia, eclampsia, HELLP syndrome, and antepartum and postpartum hemorrhage predispose women to PRAKI. Other unusual factors, like disseminated intravascular coagulation (DIC) or hemolytic uremic syndrome (HUS), should not be underestimated. Furthermore, the latest published data showed unfavorable maternal and fetal outcomes in pregnancies affected by AKI compared to the general population. Conclusions: PRAKI constitutes a serious pregnancy complication that requires immediate treatment. The higher prevalence of PRAKI in developing countries (4–26%) versus wealthy nations (1.0–2.8%) has considerably indicated the impact of socioeconomic status and the accessibility of health services.

6 December 2024 in Medicina
Verified
Journal Article
Open access
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Dimitrios PapageorgiouDimitrios Papageorgiou
Dimitrios Papageorgiou
Galateia LioutaGalateia Liouta
Galateia Liouta
ISIOAKEIM SAPANTZOGLOU
IOAKEIM SAPANTZOGLOU
EZEleftherios Zachariou
Eleftherios Zachariou
DPDimitra Pliakou
Dimitra Pliakou
EPEvangelia Pliakou
Evangelia Pliakou
The most common histological subtypes of endometrial cancer consist of endometrioid and uterine serous carcinoma, with the latter being more aggressive and accompanied by poor prognosis. Human epidermal growth factor receptor 2 (HER2) is a transmembrane tyrosine kinase receptor associated with cell proliferation, differentiation, and survival. HER2 positivity can be diagnosed in many solid tumors. It has been found that approximately one-third of the patients diagnosed with serous carcinoma may overexpress HER2/neu protein and/or show the amplification of the c-erBb2 gene. The prognostic and predictive value of HER2 biomarker is nowadays highlighted and the updates of HER2-directed treatment offer new opportunities for improved efficacy and survival. A number of HER2-targeted therapies have become available in recent years and have had promising results, prompting full drug approvals and additional investigation in many cancer types, among which is endometrial cancer. Data from clinical trials combining classical chemotherapy with anti-HER2 agents, mainly trastuzumab, alone or in combination with pertuzumab, do exist and have been incorporated into international guidelines. Moreover, further research with antibody–drug conjugates and tyrosine kinase inhibitors is being conducted. Acquired resistance remains an important problem, and its underlying mechanisms in endometrial cancer are mostly unknown. Studies exploring earlier use of Her2-directed therapy are also on the way. The purpose of this literature review is to describe the available therapies in the current clinical practice and the most prominent research data regarding the future. In any case, a number of unmet medical needs do exist for HER2-positive serous endometrial cancer, and additional research and studies are warranted to provide further understanding and improved outcomes for this tumor type.

5 November 2025 in Cancers
Verified
Journal Article
Open access
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Dimitrios PapageorgiouDimitrios Papageorgiou
Dimitrios Papageorgiou
EZEleftherios Zachariou
Eleftherios Zachariou
ISIOAKEIM SAPANTZOGLOU
IOAKEIM SAPANTZOGLOU
ETElias Tsakos
Elias Tsakos
EXEmmanouil M. Xydias
Emmanouil M. Xydias
NPNikolaos Plevris
Nikolaos Plevris
Background/Objectives: Obesity is a well-established risk factor for endometrial cancer and presents challenges for surgical management. Robotic-assisted surgery offers a minimally invasive approach with potential benefits for obese patients. This study sought to assess the impact of body mass index (BMI) on surgical performance and short-term outcomes in patients undergoing robotic surgery for early-stage endometrial cancer, focusing on follow-up and perioperative treatment. Methods: A retrospective analysis was conducted on 54 patients with early-stage endometrial cancer who underwent a robotic total hysterectomy, bilateral salpingo-oophorectomy, and indocyanine green sentinel lymph node biopsy between January 2021 and December 2024 at two tertiary centers. Patients were stratified by body mass index. Surgical variables, sentinel lymph node detection rates, peri- and postoperative complications, length of hospital stay, and short-term oncologic outcomes were assessed. Statistical comparisons were performed using ANOVA, chi-square tests, and Pearson’s correlation analysis. Results: The mean patient age was 59.7 years, with a mean BMI of 31.1 kg/m2. Bilateral sentinel lymph node detection was successful in 87% of cases, with no significant differences between BMI groups. Console time, hospital stay, and complication rates were comparable across BMI categories. Console time positively correlated with the number of lymph nodes removed (r = 0.302, p = 0.026), but not with BMI. At a mean follow-up of 24.4 months, no recurrences were observed. Conclusions: Robotic surgery for early-stage endometrial cancer is safe and effective regardless of BMI, including in patients with Class III obesity. BMI does not negatively impact surgical or short-term oncologic outcomes, supporting robotic surgery as an optimal approach in obese endometrial cancer patients.