MKI67 and androgen insensitivity syndrome: In this study, 5% was selected as the classification threshold based on our data characteristics and previous similar studies, and relatively good results were obtained, which indicated that proliferative activity with a Ki-67 expression level of 5% may be a crucial turning point for progression from non-invasive adenocarcinomas (AAH/AIS/MIA) to invasive adenocarcinomas.