KRAS and adenomyosis: We have shown that: (i) KRAS-mutated adenomyotic clones originate from NE (Fig. 4a–c); (ii) KRAS mutations are shared by co-occurring adenomyosis and endometriosis lesions (Fig. 4d–i); and (iii) the presence of KRAS mutations in adenomyosis is associated with the co-occurrence of endometriosis (Table 1 and Supplementary Data 22).