Molecular profiling of primary endometrioid endometrial cancer and matched lung metastases: mutation as a potential driver.

•Both primary endometrial cancers (ECs) and matched lung metastases shared a common ancestor with independent evolution at each site.•The two endometrioid ECs studied acquired additional mutations during the distant metastatic process.•Subclonal hotspot mutations in the two primary ECs studied became clonal in the distant metastases.