Diethylstilbestrol-exposed uterus. Myometrial hypertrophy results in a T-shaped uterine cavity and cavity irregularity, which is pathognomonic for the anomaly. Typically, the uteri are hypoplastic

DES exposure. HSG image shows T configuration of endometrial cavity (arrow)

DES exposure. MR images show T configuration, constriction bands (long arrows), and cavitary narrowing (short arrows)