Current Organizations / Institutes

The organizations/institutes from the scholar's latest article

Previous Organizations / Institutes

The organizations / institutes from the scholar's other articles in the past ten years


Stavros Athanasiou has a total of 281 co-authors. Here are the top co-authors by number of shared publications:

  • Themos Grigoriadis

    Department of Minimally Invasive Gynecologic Surgery, Alexandra University Hospital, 11528 Athens, Greece

    38 shared publications
  • Eleni Pitsouni

    Urogynaecology Unit, 1st Department of Obstetrics and Gynecology, "Alexandra" Hospital, National and Kapodistrian University of Athens, Greece

    19 shared publications
  • Aris Antsaklis

    1st Department of Obstetrics and Gynecology of the University of Athens, Alexandra Hospital, 80 Queen Sophie Avenue and Lourou Street, 11528 Athens, Greece

    17 shared publications
  • Matthew E. Falagas

    Alfa Institute of Biomedical Sciences, 15123 Athens, Greece

    16 shared publications
  • Dimitrios Zacharakis

    Urogynecology Unit, 1st Department of Obstetrics and Gynaecology, “Alexandra” General Hospital, National and Kapodistrian University of Athens, 11528 Athens, Greece

    13 shared publications
  • Stefano Salvatore

    Obstetrics and Gynecology Unit, Vita-Salute San Raffaele University, IRCCS San Raffaele Hospital, Milan, Italy

    13 shared publications

Latest Publications

  • Open Access

    Technical Challenges and Surgical Considerations in Sacrospinous Ligament Fixation for Apical Prolapse Repair

    by Stavros Athanasiou, Anastasia Prodromidou, Dimitrios Zacharakis, Aristotelis-Marios Koulakmanidis, Giuseppe Mascellino, Athanasios Douligeris, Nikolaos Kathopoulis, Themistoklis Grigoriadis

    Background/Objectives: Sacrospinous ligament fixation (SSLF) is a well-established native tissue vaginal procedure for uterine/vault prolapse. Despite favorable success rates, the procedure presents technical challenges due to the deep operative field and proximity to critical neurovascular structures. To review current evidence regarding anatomical considerations, surgical technique, fixation strategies, suture materials, device-assisted methods, and perioperative complications in SSLF. Methods: A structured narrative review of the contemporary literature was conducted, focusing on comparative and systematic studies evaluating unilateral versus bilateral fixation, anterior versus posterior approach, suture type and number, and suture-capturing or anchor-based devices. Anatomical, functional, and safety outcomes were critically analyzed. Results: SSLF achieves favorable anatomical success rates with significant symptom improvement. Meticulous knowledge of sacrospinous ligament anatomy is critical to reduce bleeding and neuropathic complications. Unilateral fixation remains the most common technique, while bilateral fixation may benefit selected patients. According to the available evidence, the anterior approach may better preserve vaginal length, although it may be associated with longer operative time and short-term urinary morbidity. Absorbable and permanent sutures appear to provide comparable anatomical durability, while placement of two sutures remains the most commonly used fixation strategy. Device-assisted techniques may facilitate suture placement but require advanced anatomical expertise. Conclusions: SSLF is a safe and effective suspension procedure when individualized and meticulously performed. Further randomized studies evaluating long-term anatomical and patient-reported outcomes are warranted.


  • Open Access

    Vaginal Natural Orifice Transluminal Endoscopic Surgery (vNOTES) in Patients with Gynecological Malignancies: A Systematic Review

    by Aristotelis-Marios Koulakmanidis, Evangelia Kontogeorgi, Dimitrios Zacharakis, Anastasia Prodromidou, Ioakeim Sapantzoglou, Giuseppe Mascellino, Konstantinos Kypriotis, Nikolaos Kathopoulis, Dimos Sioutis, Charalampos Voros, et al.

    Aim: The purpose of this study was to investigate the safety, efficacy, and clinical outcomes of the vaginal natural orifice transluminal endoscopic surgery (vNOTES) technique in patients suffering from gynecological cancer. Methods: A systematic review of the literature was conducted from inception to October 2025 following the PRISMA guidelines. PubMed, Google Scholar, and the Cochrane Library were searched for studies investigating vNOTES in gynecological malignancies. Study quality was evaluated using the Newcastle–Ottawa Scale, the National Institute of Health and the Joanna Briggs Institute critical appraisal tools. Results: The search identified 11 observational cohort studies, 28 case series, and 22 case reports. A total of 926 patients with suspected or confirmed gynecologic malignancies underwent surgery via vNOTES approach. The combination of hysterectomy, bilateral salpingo-oophorectomy, and sentinel lymph node biopsy represented the most commonly performed surgical procedure. Endometrial cancer was the most frequent oncological indication. The included studies evaluated the perioperative outcomes, including operative time, estimated blood loss, lymph node assessment, conversion rates and complications. Conclusions: The vNOTES approach appeared to be feasible and at least non-inferior to standard surgical treatments for patients with early-stage gynecologic malignancies. However, the small sample sizes and heterogeneity among studies limit the strength of the evidence and preclude definitive conclusions.

  • Open Access

    Indications and Limitations of vNOTES for the Surgical Staging of Early-Stage Ovarian Cancer: A Narrative Literature Review

    by Vasilios Lygizos, Dimitrios Efthymios Vlachos, Dimitrios Haidopoulos, Aikaterini Karagouni, Antonia Varthaliti, Maria Fanaki, Nikolaos Thomakos, Christos Damaskos, Nikolaos Garmpis, Gerasimos Tsourouflis, et al.

    Introduction: Natural Orifice Transluminal Endoscopic Surgery (NOTES) via the vagina (vNOTES) has recently appeared on the gynecology horizon as a fresh minimally invasive approach. Although vNOTES for benign adnexal conditions is being increasingly employed, very limited experiences exist for its application in ovarian tumors. In this review, the current state of vNOTES applicability for borderline ovarian tumors (BOTs) and estimated early-stage epithelial ovarian cancer (EOC) is assessed. Methods: A narrative literature review was performed to examine operative viability, perioperative safety and functional outcomes, and oncologic details as documented for patients with ovarian tumors undergoing vNOTES. Results: In the current literature, vNOTES has been utilized for adnexectomy, hysterectomy, infracolic omentectomy, peritoneal biopsies, and sampling of selective pelvic lymph nodes in carefully selected patients. The perioperative parameters—bleeding, perioperative pain, and length-of-stay indicators—have been satisfactory with minimal complications. For BOT, vNOTES can meet the requirements for all surgical goals except lymphadenectomy for metastasis evaluation for systemic management. In this context, lymphadenectomy is not necessary for BOT and therefore is no contraindication for vNOTES. However, for invasive EOC, this is a significant drawback as there is no lymphadenectomy for the evaluation and management for this complex subgroup. The oncology follow-up is prematurely limited and is heterogeneous and underpowered. Conclusions: Based on current available data, vNOTES is possible in a selected group of patients with borderline ovarian tumors and in patients with adnexal lesions that are believed to be in early-stage disease based upon imaging studies. For the treatment of invasive epithelial ovarian cancer, vNOTES should not be considered an independent staging procedure at any FIGO stage, but it might find a supplemental place in the setting of a hybrid procedure in a highly selected group of patients in an experienced center.


  • Open Access

    Feasibility and Clinical Application of Vaginal Natural Orifice Transluminal Endoscopic Surgery (VNOTES) in Early-Stage Ovarian Cancer: A Narrative Literature Review

    by Vasilios Lygizos, Dimitrios Efthymios Vlachos, Dimitrios Haidopoulos, Aikaterini Karagouni, Antonia Varthaliti, Maria Fanaki, Nikolaos Thomakos, Damaskos Christos, Nikolaos Garmpis, Gerasimos Tsourouflis, et al.

    Background: Vaginal Natural Orifice Transluminal Endoscopic Surgery (vNOTES) represents a novel evolution in minimally invasive gynecologic surgery, combining endoscopic visualization with a transvaginal access route. Although its safety and efficacy in benign conditions and endometrial cancer have been well established, evidence regarding its role in ovarian malignancies remains limited. Objective is to evaluate the feasibility, perioperative safety, and oncologic adequacy of vNOTES for the surgical management and staging of apparent early-stage ovarian cancer.Methods: A narrative literature review was performed following a PICO-driven framework. Databases including PubMed, Scopus, Cochrane CENTRAL, ClinicalTrials.gov, and Google Scholar were searched up to September 2025. Eligible studies included case reports, series, and comparative analyses reporting outcomes of vNOTES in early-stage ovarian cancer or borderline ovarian tumors. Data on feasibility, intra- and postoperative complications, tumor spillage, conversion rates, and oncologic outcomes were synthesized descriptively.Results: The current evidence base comprises several case reports and small series (totaling approximately 50 reported patients). Across studies, vNOTES enabled completion of standard staging steps—oophorectomy, hysterectomy, omentectomy, peritoneal biopsies, and selective lymphadenectomy—entirely via the transvaginal route in nearly all cases, with conversion rates approaching zero. Estimated blood loss was minimal (≤150 mL), median operative times ranged from 45–90 minutes, and hospital stay was typically ≤2 days. Complication rates were low, and intraoperative tumor spillage was rare (<5%). Short- to medium-term follow-up (≤3 years) revealed recurrence rates consistent with expected outcomes for early-stage disease and no disease-related deaths.Conclusions: Early evidence indicates that vNOTES is a technically feasible and safe approach for carefully selected patients with apparent early-stage ovarian cancer, achieving oncologically sound procedures with reduced postoperative pain, minimal morbidity, and excellent cosmetic outcomes. Nevertheless, its use should currently be limited to specialized centers with vNOTES expertise, pending confirmation of long-term oncologic equivalence through multicenter prospective studies.

  • Open Access

    Vaginal Natural Orifice Transluminal Endoscopic Surgery (vNOTES) for Gynecological Procedures in Obese Patients: A Systematic Review

    by Aristotelis-Marios Koulakmanidis, Christos Vrysis, Dimitrios Zacharakis, Evangelia Kontogeorgi, Ioakeim Sapantzoglou, Charalampos Voros, Athanasios Gkirgkinoudis, Christos Damaskos, Nikolaos Garmpis, Gerasimos Tsourouflis, et al.

    Aim: This study was conducted to determine the feasibility, safety, and clinical outcomes of the vaginal natural-orifice transluminal endoscopic surgery (vNOTES) approach in gynecology for obese patients. Methods: PubMed, Cochrane Library, and Google Scholar were searched, from inception to April 2025. A systematic review was performed following the PRISMA guidelines. Studies assessing the use of vNOTES for gynecological procedures in obese women were included. The quality of included articles was evaluated according to the Newcastle–Ottawa Scale. Results: The search yielded three retrospective cohort studies, one cross-sectional, and ten case series. The patients in the vNOTES group (n = 99) had statistically significant shorter operative times, reduced hospitalization, lower postoperative pain scores, fewer perioperative complications, and improved quality of life when compared to the laparoscopy group (n = 84). A study compared obese women to non-obese women undergoing vNOTES and found that operative times were longer in the obese group. Conversion to laparoscopy or laparotomy occurred in fewer than 5% of cases, and intraoperative and postoperative complication rates were low across all studies. Conclusions: vNOTES appears to be safe and potentially superior to other minimally invasive techniques. The small sample size of the case series and the lack of a sufficient number of comparative studies limit the strength of the conclusions.


  • Open Access

    Is the Addition of CO2 Laser to β3-Adrenoceptor Agonist Mirabegron Effective in the Management of Overactive Bladder? Results of a Randomized Controlled Trial

    by Konstantinos Kypriotis, Anastasia Prodromidou, Stavros Athanasiou, Dimitrios Zacharakis, Nikolaos Kathopoulis, Athanasios Douligeris, Veatriki Athanasiou, Lina Michala, Themos Grigoriadis

    Background and Objectives: This study aimed to assess whether the addition of fractional CO2 laser therapy to standard pharmacologic treatment with Mirabegron, a β3-adrenoceptor agonist, enhances the clinical outcomes in the management of overactive bladder syndrome (OAB) in postmenopausal women. Materials and Methods: Τhis was a prospective, randomized, double-blind, sham-controlled trial including 50 postmenopausal women with moderate-to-severe OAB symptoms. Participants were randomized (1:1) to receive mirabegron 50 mg daily in combination with either active fractional CO2 laser therapy (Group A) or sham laser treatment (Group B). Both groups underwent three monthly sessions of vaginal laser treatment and were followed for a total of four months. Clinical assessments were performed at baseline and monthly visits (T0–T3), using validated instruments including the Overactive Bladder Questionnaire (OAB-q), King’s Health Questionnaire (KHQ), Urinary Distress Inventory (UDI-6), Pelvic Floor Impact Questionnaire (PFIQ-7), Patient Global Impression of Improvement (PGI-I), and 3-day voiding diaries. The trial was registered at ClinicalTrials.gov (Identifier: NCT03846895). Results: Significant symptom improvement was observed within both groups over time, with reductions in urinary frequency, urgency, nocturia, and incontinence episodes, as well as improvements in quality-of-life scores. However, intergroup comparisons revealed no statistically significant differences in any primary or secondary outcomes. Both treatment modalities demonstrated similar effectiveness across all measured parameters. Conclusions: In this randomized controlled trial, the adjunctive use of fractional CO2 laser therapy did not offer additional clinical benefit beyond mirabegron monotherapy in the short-term management of OAB. These findings underscore the need for further investigation into tailored therapeutic strategies, particularly in populations with overlapping genitourinary syndrome of menopause or more refractory OAB symptoms.


  • Open Access

    PropofolVersusDexmedetomidine for Conscious Sedation During Vaginal Hysterectomy With Pre-emptive Local Anesthesia: A Prospective Cohort Study

    by Sofia Hadzilia, Themos Grigoriadis, Anastasia Prodromidou, Emmanouil Stamatakis, Dimitra Papadopoulou, Dimitrios Zacharakis, Stavros Athanasiou, Dimitrios Valsamidis

    Background/Aim: Hysterectomy is the most frequent gynecological surgery. Vaginal hysterectomy (VH) seems to be related to favorable perioperative outcomes compared to abdominal or laparoscopic approaches. As the population ages, anesthesia that is safer for the elderly, such as local anesthesia (LA) with conscious sedation, is gaining popularity and is related to favorable outcomes in patients’ recovery compared to general or regional anesthesia. We aimed to evaluate the efficacy of dexmedetomidine versus propofol for women undergoing VH for uterine prolapse under LA and conscious sedation. Patients and Methods: A prospective study on 40 women with uterine prolapse stage ≥3 who had VH under LA with conscious sedation under either dexmedetomidine (n=20) or propofol (n=20) was performed. A standardized surgical approach with continuous hemodynamic monitoring and sedation assessment using the Ramsay Sedation Scale (RSS) was conducted. The primary endpoint of the study was to determine the percentage of patients receiving intraoperative fentanyl. Results: Analysis of outcomes demonstrated a significant reduction in the proportion of patients requiring intraoperative rescue fentanyl (35% vs. 5%, respectively, p=0.04) and in postoperative pain scores, with more patients achieving an optimal RSS score of 3 in the dexmedetomidine group. Conclusion: Based on the findings of the present study, dexmedetomidine offered superior analgesia and patient comfort compared to propofol, suggesting a favorable anesthetic profile for VH under LA.

  • Open Access

    CO2 Laser versus Sham Control for the Management of Genitourinary Syndrome of Menopause: A Systematic Review and Meta-Analysis of Randomized Controlled Trials

    by Anastasia Prodromidou, Dimitrios Zacharakis, Stavros Athanasiou, Nikolaos Kathopoulis, Antonia Varthaliti, Athanasios Douligeris, Lina Michala, Veatriki Athanasiou, Stefano Salvatore, Themos Grigoriadis

    In the context of the menopausal transition, genitourinary syndrome of menopause (GSM) refers to a range of genitourinary symptoms, from vaginal dryness to dysuria and urinary urgency. While hormonal treatments are standard, their associated side effects have driven the exploration of alternatives like vaginal CO2 laser. We aimed to evaluate the randomized controlled trials (RCTs) comparing vaginal CO2 laser treatment for GSM to sham controls. This systematic review sourced four electronic databases until June 2023. The analysis incorporated seven RCTs with 407 women. The CO2 laser and sham control were comparable for most parameters, including the female sexual function index (FSFI) and visual analogue scale (VAS) for dyspareunia, vaginal health index, pH, and patient satisfaction. However, the CO2 laser group showed significant improvement in the vaginal assessment scale for GSM symptoms. Sensitivity analyses revealed that parameters like FSFI showed significant differences in favor of CO2 laser group upon the exclusion of specific studies. In conclusion, vaginal CO2 laser therapy emerges as a promising alternative for GSM management, especially for most bothersome GSM symptoms; however, the need for further well-designed RCTs remains to validate its broad safety and efficacy.


  • Open Access

    A Study Protocol of Micro-Ablative Fractional CO2 Laser in Postmenopausal Women With Overactive Bladder Syndrome

    by Konstantinos Kypriotis, Dimitris Zacharakis, Nikolaos Kathopoulis, Michail Diakosavvas, Christos Kalantzis, Anastasia Prodromidou, Stavros Athanasiou, Themos Grigoriadis

    Introduction: This is a presentation of a study protocol in order to evaluate whether the application of CO2 laser can additionally benefit the improvement of the symptoms of overactive bladder in postmenopausal women who have just started mirabegron as a treatment. Materials and methods: This is a study protocol of a randomized double-blind placebo-controlled trial. A total of 50 menopausal women will participate in the study. All patients will start treatment with mirabegron 50 mg and will be randomized into two groups. Women in group A (control) will undergo CO2 laser treatments while those in group B (placebo group) will receive placebo CO2 laser treatments. In total, three monthly sessions will be held in both groups. The monitoring and evaluation of the results will be carried out by completing a three-day urination diary, as well as by completing the Female Lower Urinary Tract Symptoms, Overactive Bladder Questionnaire, King’s Health Questionnaire, Urinary Distress Inventory, Pelvic Floor Impact Questionnaire, Patient Global Impression of Improvement, before each session and a month after the last one. Differences between groups will be assessed at baseline and every month following the three laser therapies. Results: This is an ongoing study protocol, and we are expecting the analysis of the results in 2024. Conclusions: The use of laser CO2 in postmenopausal women with overactive bladder syndrome may be a well-tolerated alternative treatment. The goal of our study is to evaluate the efficacy of laser treatment in combination with b3-adrenoreceptor agonist therapy.

  • Vaginal laser therapy for GSM/VVA: where we stand now – a review by the EUGA Working Group on Laser

    by S. Salvatore, A. F. Ruffolo, C. Phillips, S. Athanasiou, L. Cardozo, M. Serati, the EUGA Working Group

    Vulvovaginal atrophy (VVA) is a chronic progressive condition that involves the genital and lower urinary tracts, related to the decrease of serum estrogenic levels when menopause occurs. The definition of genitourinary syndrome of menopause (GSM) is a medically more accurate, all-encompassing and publicly acceptable term than VVA. Due to the chronic progressive trend of GSM, symptoms tend to reappear after the cessation of therapy, and frequently long-term treatment is required. First-line therapies include vulvar and vaginal lubricant or moisturizers, and, in the case of failure, low-dose vaginal estrogens are the preferred pharmacological therapy. Populations of patients, such as breast cancer (BC) survivors, are affected by iatrogenic GSM symptoms with concerns about the use of hormonal therapies. The non-ablative erbium:YAG laser and the fractional microablative CO2 vaginal laser are the two main lasers evaluated for GSM treatment. The aim of this comprehensive review is to report the efficacy and safety of Er:YAG and CO2 vaginal lasers for GSM treatment. Vaginal laser therapy has been demonstrated to be effective in restoring vaginal health, improving VVA symptoms and sexual function. The data suggest that both Er:YAG and CO2 vaginal lasers are safe energy-based therapeutic options for management of VVA and/or GSM symptoms in postmenopausal women and BC survivors.