Patterns of recurrence in surgically treated women for TP53-mutated endometrial carcinomas.

Objective: To describe the patterns of recurrence and the prognosis of patients with a recurrent TP53 mutated endometrial carcinoma treated initially by surgery.

Methods: All patients with endometrial carcinoma, treated at hospital European Georges Pompidou between 2001 and 2021 were retrospectively included. Patients were separated into two groups: TP53-mutated and not TP53-mutated (POLE/ultramutated-like (POLEmut), dMMR (mismatch repair-deficient) and NSMP (No specific molecular profile)). We estimated survival using recurrence free survival, overall survival and overall survival from recurrence. The risk of recurrence according to TP53 status and the type of recurrence (locoregional recurrence, peritoneal recurrence, and metastasis) were also compared between the two groups.

Results: Two hundred and ninety-one patients with endometrial carcinoma were included. Of these, 57 were TP53-mutated and 234 patients were not TP53-mutated. TP53 mutated patients had the worst recurrence free survival and overall survival (p < 0.001 for each). The hazard rate of recurrence was higher during the first three years for TP53 mutated endometrial carcinoma then tend to join the one of no TP53 mutated. There was a statistical difference between the two groups in terms of cumulative incidence of peritoneal recurrence (p = 0.002). There was, however, no statistical difference in overall survival from recurrence.

Conclusions: TP53-mutated endometrial carcinoma were more likely to experience a recurrence during the first three years and most often peritoneal recurrence compared to not TP53-mutated. TP53 status in endometrial carcinoma could be useful to define follow-up. Further prospective studies are required to assess the predictive impact of TP53 mutation on chemotherapy benefit.