Diethylstilbestrol-induced upper genital tract abnormalities.

In utero diethylstilbestrol (DES) exposure has recently been associated with apparently unique abnormalities of the upper genital tract. Utilizing a standardized technique of hysterosalpingography (HSG) and a linear planimeter, the following measurements were made in a group of 13 DES-exposed women and compared with a control group of 22 women undergoing HSG during infertility investigations (mean +/- standard error: endometrial cavity area, 323.23 +/- 32.13 sq mm versus 626.56 +/- 52.75 sq mm; endometrial cavity circumference, 128.65 +/- 5.08 mm versus 140.52 +/- 5.56 mm; upper uterine segment length, 28.80 +/- 1.11 mm versus 38.03 +/- 1.81 mm; lower uterine sugment length, 36.03 +/- 4.77 mm versus 42.24 +/- 2.39 mm; intercornual distance, 36.40 +/- 2.56 mm versus 38.25 +/- 1.58 mm; internal os diameter, 3.90 +/- 0.44 mm versus 4.43 +/- 0.23 mm; widest diameter of the endocervical canal, 3.78 +/- 0.40 mm versus 9.39 +/- 0.60 mm; isthmic tubal diameter, 1.25 +/- 0.08 mm versus 1.20 +/- 0.01 mm; ampullary tubal diameter, 4.79 +/- 0.43 mm versus 4.65 +/- 0.22 mm. The endometrial cavity area, upper uterine segment, and endocervical canal measurements were significantly smaller in the DES-exposed group (P less than 0.01). The upper genital tract abnormalities observed appeared to be unlike spontaneously occurring Müllerian malformations and correlated with DES-induced cervicovaginal changes. Primary dysmenorrhea and menstrual irregularity occurred in 40% and 47%, respectively, of the DES-exposed patients.