[How were used recommendations for endometrial carcinoma? Britain retrospective study]

Impact of the new molecular classification of endometrial cancer: A French cohort study

OBJECTIVE

To evaluate the potential impact of the latest ESGO guidelines for endometrial cancer with molecular classification on the management strategy in a French cohort.

METHODS

All patients treated between January 1st, 2014 and December 31, 2020 for an endometrial cancer at the Centre Hospitalier Intercommunal de Créteil (CHIC, FRANCE) were selected from our prospectively maintained database. All postoperative samples were reviewed to confirm histological subtype, myometrial infiltration, cytonuclear grade and presence of lymphovascular emboli. Analysis of p53, MLH1, MSH2, MSH6, PMS2 genes was performed by immunohistochemistry first then a systematic POLE sequencing was performed to identify gene mutation. The impact of the latest ESGO 2020 guidelines was assessed regarding adjuvant therapy, surgical strategy, and survival.

RESULTS

Eighty patients were analyzed, including 70% NSMP (n = 56), 13.75% MSI (n = 11), 10% p53 mutated (n = 8) and 6.25% POLEmut (n = 5). A total of 21 patients (26.3%) were reclassified using the latest ESGO classification. Patients classified at low risk or with advanced / metastatic disease were not reclassified using molecular analysis. Molecular analysis and the latest ESGO classification had the most important impact on patients initially classified at intermediate - high risk that were reclassified in intermediate (10/23) and in low (4/23) risk. Nine patients (11.3%) were overtreated according to the 2020 ESGO classification: six patients in the low - risk group (4 received vaginal brachytherapy and 2 external radiotherapy) and three in the intermediate risk group (3 received external irradiation and 1 received chemotherapy). None of the patients in our cohort would have been undertreated using the 2020 ESGO classification. Patients within the p53 mutated group were the most likely to experience recurrence (37.5%, 3/8) and none of the patients POLE mutated recurred.

CONCLUSION

Around one in 4 patients were reclassified in a more accurate prognostic group using molecular diagnosis and the latest ESGO guidelines which could decrease the use of adjuvant therapies to spare morbidity.

[Non endometroid endometrial cancer guidelines evaluation: A multicentric retrospective study]

Introduction

Les carcinomes de l’endomètre de type 2 sont des cancers peu fréquents et de mauvais pronostique. Il existe très peu d’étude analysant leur prise en charge. L’objectif de l’étude était d’étudier la prise en charge des carcinomes de type 2 dans nos centres en évaluant l’application des recommandations.

Matériel et méthode

Il s’agit d’une étude multicentrique rétrospective enregistrant les cancers de l’endomètre de type 2 pris en charge de janvier 2009 à décembre 2019. Les analyses ont été adaptées aux dernières recommandations françaises appliquées par rapport à l’année de prise en charge.

Résultats

Soixante-quatorze carcinomes de type 2 ont été analysés dans dix centres: 34 carcinosarcomes (45,9 %), 29 carcinomes séreux (39,2 %), neuf carcinomes à cellules claires (12,2 %) et deux carcinomes indifférenciés (2,7 %). Lors de la prise en charge initiale, les recommandations étaient appliquées dans 45,9 % des cas. Le principal motif de non-application des recommandations était la non-réalisation d’une stadification ganglionnaire chirurgicale pour 20 patientes (57,1 %). Lors de la prise en charge adjuvante, les recommandations étaient appliquées dans 37,8 % des cas. Le principal motif de non-application des recommandations était la non-réalisation d’une restadification ganglionnaire chirurgicale ou radiologique pour 25 patientes (67,6 %).

Discussion

L’applicabilité des recommandations pour la prise en charge des carcinomes de type 2 reste difficile en raison de l’âge élevé et des comorbidités des patientes notamment pour la réalisation d’une stadification chirurgicale ganglionnaire pelvienne et lombo-aortique. L’utilisation de nouvelles techniques de stadification permettrait de mieux sélectionner les indications de curages ganglionnaires.