BACKGROUND: This study aimed to evaluate the effectiveness of different tracers´ application techniques for sentinel lymph node (SLN) detection in women with endometrial cancer undergoing laparotomy. Additionally, potential risk factors for SLN detection failure were assessed. METHODS: We retrospectively analyzed data from 248 endometrial cancer patients who underwent abdominal surgery with SLN mapping between January 2020 and March 2024. Statistical analyses were conducted using the Wilcoxon rank sum test for continuous variables and either Pearson's chi-square test or Fisher's exact test for categorical variables, with a significance level set at p < 0.05. RESULTS: Group I + S consisted of 147 women with intracervical and subserosal tracers´application and group I + I included 101 women with intracervical and intrafundal application. Successful detection of SLN on both sides was achieved in 39.9% (99/248) of all patients, in 38.1% (56/147) in the I + S group and in 42.6% (43/101) in the I + I group, respectively. SLNs were identified in 32.7% (81/248) of all patients on only one side of the pelvis, in 31.3% (46/147) in the I + S and in 34.7% (35/101) in the I + I group, respectively. No SLNs were detected in 27.4% (68/248) of all subjects, comprising 30.6% (45/147) from the I + S and 22.8% (23/101) from the I + I group. Although the success rate of SLN detection was higher in the I + I group and on the right side of the pelvis regardless of the detection method, these differences were not statistically significant. An age exceeding 66.3 years was recognized as a critical risk factor for successful detection, other followed factors did not demonstrate a statistically significant impact on overall detection success. Additional significant risk factors were identified: depth of tumor myometrial invasion on the right side, history of pelvic surgery, and total tumor volume on the left side. CONCLUSIONS: The study did not reveal significant differences in SLN mapping success between the groups receiving intracervical + intrafundal and intracervical + subserosal tracers´applications among endometrial cancer patients treated via open surgery. Overall, older age emerged as the most critical risk factor for SLN detection failure, while other assessed factors did not show a statistically significant impact on overall detection success. TRIAL REGISTRATION: Institution University Hospital Královské Vinohrady, Prague, Czech Republic. REGISTRATION NUMBER: EK-VP-21-0-2023. Date of registration 7-JUN-2023. This study was retrospectively registered in compliance with the Declaration of Helsinki.

• Klíčová slova
• Detection failure, Detection success, Endometrial cancer, Laparotomy, Risk factors, Sentinel lymph node, Tracer application,
• MeSH
• biopsie sentinelové lymfatické uzliny * metody   MeSH
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• lymfatické metastázy MeSH
• nádory endometria * chirurgie   patologie   MeSH
• retrospektivní studie MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• sentinelová uzlina * patologie   diagnostické zobrazování   chirurgie   MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• srovnávací studie MeSH

The International Federation of Gynaecology and Obstetrics (FIGO) introduced a new staging system for endometrial carcinoma FIGO 2023 in June 2023. The new staging system differs significantly from previous versions by incorporating other non-anatomical parameters (histological type of tumour, tumour grade and the presence of massive lymphovascular space involvement as well as the molecular classification of the tumour). The FIGO 2023 staging system enhances the accuracy of prognostic assessments for patients at a specific stage with better options for targeted treatment. Another objective was to synchronise staging as much as possible with the European oncogynaecological ESGO/ESTRO/ESP guidelines for the management of patients with endometrial carcinoma established in 2021. However, several changes are controversial. Routine molecular classification of endometrial carcinomas is not yet commonly available in most countries of the world. Another limitation of the FIGO 2023 staging system of endometrial cancer is the inclusion of variables whose definitions are still evolving, as well as variables that are subject to considerable interobserver variability in their assessment. Advantages, controversies, and limitations for clinical practice of the new FIGO 2023 endometrial cancer staging system are discussed.

Im Juni 2023 hat die Internationale Vereinigung für Gynäkologie und Geburtshilfe (FIGO) ein neues Staging-System für das Endometriumkarzinom – FIGO 2023 – eingeführt. Das neue Staging-System unterscheidet sich signifikant von früheren Versionen, da nun auch andere nicht anatomische Parameter (z. B. histologischer Tumortyp, Tumorgrad, ausgedehnter Befall des lymphatischen Raums sowie die molekulare Klassifikation von Tumoren) einbezogen wurden. Das FIGO-2023-Staging-System verbessert die prognostische Genauigkeit bei Patientinnen in einem bestimmten Tumorstadium mit einer besseren Auswahl an gezielten Behandlungsmöglichkeiten. Zweck des neuen Systems ist es auch, das FIGO-Staging weitmöglichst mit dem Staging der gynäkologisch-onkologischen Europäischen Leitlinien der ESGO/ESTRO/ESP, die im Jahre 2021 für das Management von Patientinnen mit Endometriumkarzinom aufgestellt wurden, in Einklang zu bringen. Allerdings werden mehrere Änderungen immer noch kontrovers diskutiert. So ist in den meisten Ländern der Welt die routinemäßige molekulare Klassifikation von Endometriumkarzinomen nicht allgemein üblich oder erhältlich. Eine weitere Einschränkung des FIGO-2023-Staging-Systems für das Endometriumkarzinom ist die Einbeziehung von Variablen, deren Definitionen noch im Entstehen begriffen sind, bzw. von Variablen, die eine erhebliche Interobserver-Variabilität aufweisen. Die Vorteile, Kontroversen und Einschränkungen des neuen FIGO-2023-Staging-Systems in der klinischen Praxis werden hier diskutiert.

• Klíčová slova
• ESGO, ESP, ESTRO, FIGO 2023, controversies, endometrial cancer, molecular classification, staging, staging system,
• Publikační typ
• časopisecké články MeSH