Ultrasound has been valuable as a means for detecting congenital malformations in utero. However, most reports of prenatal abnormalities have been concerned with the central nervous system, gastrointestinal tract, urinary tract, and skeleton. There have been only scant case reports of the ultrasonic description of ovarian and these have been unilocular cysts and not septated lesions. A large ovarian cyst can cause lifethreatening complications during parturition and in the neonatal period. We report on the ultrasonic features of a case of bilateral septated cysts that were correctly diagnosed prenatally and feel the ultrasonic appearance is specific for this entity.
CASE REPORTA 26-year-old gravida 3 para 1 abortus 1 woman had an obstetrical ultrasound examination to exclude the possibility of intrauterine growth retardation. There was no evidence of this entity but the head circumference/abdominal circumference ratio of 0.98 was smaller than expected so the possibility of microcephaly was raised. A subsequent examination 2 weeks later confirmed this. However, a new finding that was not present even in retrospect on the earlier examination was bilateral septated cystic masses seen in the lower fetal trunk on each side of a normal urinary bladder ( Figs. 1 and 2). The right cystic mass measured 4.0 cm, and the left one 3.0 cm. The fetal kidneys were well seen and normal. Mild polyhydramnios was present. Since no male external