B

DES exposure in utero classically leads to 1) clear-cell adenocarcinoma of the vagina/cervix, 2) vaginal adenosis, and 3) Müllerian structural anomalies such as a T-shaped uterus or other vaginal/uterine malformations [Melnick 1987, PMID 3807995; Herbst 1976, PMID 994230]. Microglandular hyperplasia is a benign cervical lesion usually linked to pregnancy or progestin/OC pill use rather than prenatal DES exposure [Heller 2016, PMID 26796659].