At last follow-up (OS: 108 months), she maintained SD with minimal toxicity. This is the first case demonstrating that full-dose megestrol acetate plus letrozole may induce durable antitumor activity in HR-high expression metastatic EC, warranting prospective validation.
Metformin combined with progesterone exerts excellent clinical efficacy in the treatment of early EC. It can significantly reduce serum tumor marker levels and BMI, and decrease the occurrence of adverse reactions.