摘要
Diagnosis of placenta accreta spectrum(PAS)Before 2018,there were various terms used to describe PAS disorders,such as morbidly adherent placenta(US/Egypt/Israel),adhesive placenta(Italy/Argentina),and pernicious placenta(Chinese mainland).An inclusive standardized terminology PAS was proposed by the International Federation of Gynecology and Obstetrics(FIGO)in March 2018 and endorsed by the Society for Maternal-Fetal Medicine and American College of Obstetricians and Gynecologists,Royal College of Obstetricians and Gynecologists,and the Society of Obstetricians and Gynecologists of Canada.1 It describes the grade of PAS which are separated into three categories:placenta adherenta or creta(PC)when the villi adhere directly to the myometrium without a decidual interface,placenta increta(PI)when the villi invade the myometrium and placenta percreta(PP)when the villi invade the full thickness of the uterine wall including the serosa.
