Localized Endometrial Proliferations of Pregnancy are Clonal Glandular Outgrowths Characterized by PTEN Loss and PIK3CA Pathogenic Variants. - Wepy C; Chapel DB; Mutter GL; Quade BJ; Nucci MR; Parra-Herran C (Modern pathology : an official journal of the United States and Canadian Academy of Pathology, Inc, 2023)