1. Early‐stage endometrial cancer, CTNNB1 mutations, and the relation between lymphovascular space invasion and recurrence
- Author
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Vida Kocbek, Coya Tapia, Sara Imboden, Jan Janzen, Nadja Scheiwiller, Michael D. Mueller, Brett McKinnon, and Hans Jörg Altermatt
- Subjects
Oncology ,medicine.medical_specialty ,Genotype ,Class I Phosphatidylinositol 3-Kinases ,Lymphovascular invasion ,medicine.medical_treatment ,03 medical and health sciences ,0302 clinical medicine ,Risk Factors ,Internal medicine ,medicine ,Humans ,PTEN ,Neoplasm Invasiveness ,Stage (cooking) ,beta Catenin ,Aged ,Neoplasm Staging ,Retrospective Studies ,030304 developmental biology ,0303 health sciences ,Hysterectomy ,biology ,business.industry ,Endometrial cancer ,PTEN Phosphohydrolase ,Obstetrics and Gynecology ,General Medicine ,medicine.disease ,Lymphovascular ,Endometrial Neoplasms ,3. Good health ,Lymphatic Metastasis ,030220 oncology & carcinogenesis ,Mutation ,Cohort ,biology.protein ,Female ,Histopathology ,Neoplasm Grading ,Neoplasm Recurrence, Local ,business - Abstract
Women diagnosed with early-stage (FIGO 1) endometrial cancer, grade 1 and 2 can have a good prognosis. Most of these women can be treated successfully with a hysterectomy and bilateral salpingo-oophorectomy and without the additional adjuvant treatment that is accompanied by more risks for complications. However, when recurrence does occur, the consequences can be dire. Accurate decisions must therefore be made by surgeons to avoid either under- or over-treatment. Risk and patient stratification for tailoring treatment still need further improvement. Both histopathology and genetic variants could be integrated into the decision process if relevant factors were identified. Morphological features and the presence of selected genetic mutations in isolated malignant endometrial epithelial cells from these tumors were analyzed in a strictly defined cohort of FIGO 1, grade 1 and 2 low-risk endometrial cancer. Their presence in this cohort, their relation to recurrence, and the association between histopathological features and mutations were determined. This analysis was performed using archival formalin-fixed paraffin-embedded tissue, complete re-evaluation of histopathological features, laser capture microdissection of epithelial cells, and a polymerase chain reaction-based mutational screening assay. Twenty-one women with recurrence, after initial identification as low-risk endometrial cancer, were compared with 20 matched control women. The histological marker of lymphovascular invasion was significantly associated with recurrence. There was also a very high prevalence of mutations in CTNNB1 gene, occurring in 50% of this cohort. PTEN mutations were also observed in 27.8% of cases and PIK3CA mutations in 22.2%; none of these mutations were significantly related to recurrence. This study supports the importance of lymphovascular space invasion to identify women with significant risk for recurrence in initially low-risk, early-stage endometrial cancer. It also identifies CTNNB1 as a significant mutation in early-stage disease, and although it may not represent a marker for recurrence its high prevalence in early stage disease could have relevance for both pathogenesis and early treatment.
- Published
- 2019