TRPC1 and neoplasm: For further investigating the TRPC1 expression in patients with different menopausal statuses, a subgroup analysis was performed, which showed that TRPC1 protein expression was elevated in tumor tissue compared to normal endometrium of both pre‐menopause (IHC score: 5.1 ± 2.9 vs. 2.7 ± 0.9, p = 0.011, Supplementary Figure S1A) and post‐menopause (IHC score: 5.4 ± 3.0 vs. 2.7 ± 1.8, p < 0.001, Figure S1B) EC patients.