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Defining Substantial Lymphovascular Space Invasion in Endometrial Cancer

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  1. Substantial Lymphovascular Space Invasion Is an Adverse Prognostic Factor in High-risk Endometrial Cancer

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  2. Neuroendocrine Tumors of the Fallopian Tube: Report of a Case Series and Review of the Literature

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  3. A Selective Biomarker Panel Increases the Reproducibility and the Accuracy in Endometrial Biopsy Diagnosis

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  4. Glycogen Storage Disease Type IV: A Case With Histopathologic Findings in First-Trimester Placental Tissue

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  5. History of gynecological pathology XXV. Dr Gunnar Teilum

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  1. Preoperative predictors of inguinal lymph node metastases in vulvar cancer - A nationwide study

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  2. Substantial Lymphovascular Space Invasion Is an Adverse Prognostic Factor in High-risk Endometrial Cancer

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  3. Identification of Stably Expressed Reference microRNAs in Epithelial Ovarian Cancer

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  4. CA-125 Levels Are Predictive of Survival in Low-Grade Serous Ovarian Cancer-A Multicenter Analysis

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  5. MCM3 is a novel proliferation marker associated with longer survival for patients with tubo-ovarian high-grade serous carcinoma

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Lymphovascular space invasion (LVSI) occurs in a minority of endometrial cancer (EC) cases, and the extent of LVSI is an important risk factor for recurrence and/or metastases. Our aim was to improve the reproducibility of measuring clinically meaningful LVSI by performing a quantitative analysis of the correlation between LVSI and the risk of pelvic lymph node recurrence in EC. EC samples from PORTEC-1 and PORTEC-2 trials were retrieved and used to collect quantitative data, including the number of LVSI-positive vessels per H&E-stained slide. Using a predefined threshold for clinical relevance, the risk of pelvic lymph node recurrence risk was calculated (Kaplan-Meier method, with Cox regression) using a stepwise adjustment for the number of LVSI-positive vessels. This analysis was then repeated in the Danish Gynecological Cancer Database (DGCD) cohort. Among patients in PORTEC-1 and PORTEC-2 trials who did not receive external beam radiotherapy, the 5-yr pelvic lymph node recurrence risk was 3.3%, 6.7% (P=0.51), and 26.3% (P<0.001), respectively when 0, 1 to 3, or ≥4 vessels had LVSI involvement; similar results were obtained for the DGCD cohort. Furthermore, both the average number of tumor cells in the largest embolus and the number of LVSI-positive H&E slides differed significantly between focal LVSI and substantial LVSI. On the basis of these results, we propose a numeric threshold (≥4 LVSI-involved vessels in at least one H&E slide) for defining clinically relevant LVSI in EC, thereby adding supportive data to the semiquantitative approach. This will help guide gynecologic pathologists to differentiate between focal and substantial LVSI, especially in borderline cases.

Original languageEnglish
JournalInternational journal of gynecological pathology : official journal of the International Society of Gynecological Pathologists
Volume41
Issue number3
Pages (from-to)220-226
Number of pages7
ISSN0277-1691
DOIs
Publication statusPublished - 1 May 2022

Bibliographical note

Copyright ©2021International Society of Gynecological Pathologists.

    Research areas

  • Endometrial Neoplasms/diagnosis, Female, Humans, Lymph Nodes/pathology, Lymphatic Metastasis/pathology, Lymphatic Vessels/pathology, Neoplasm Invasiveness/pathology, Neoplasm Staging, Prognosis, Reproducibility of Results, Retrospective Studies

ID: 70635625