Abstract

Recently, widespread use of ultrasonic examination during the perinatal period has increased an opportunity to detect asymptomatic or small cysts in newborns, and it has also become known that these cysts have a natural tendency to disappear. From this, we can not reach any consensus of its correct treatment. We experienced 5 cases of neonatal ovarian cysts, of which 2 were diagnosed before birth. In 4 of the 5 cases, natural course was observed; in 2 cases cysts started to reduce within 1 week and disappeared within 1 month after birth; and in the other 2 cases, no reduction was observed and the lesions were excised on the 20th and 40th day of life, respectively. The remaining one case was found to have a large cyst on the 28th day after birth and operated on. From these findings, we think proper to treat the cysts according to the following guidelines: when cysts with a diameter of less than 4 cm are detected before birth or during an early postnatal period, the natural course should initially be observed. If a tendency for regression is not observed in 1-2 weeks, or if the cyst is larger than 4 cm, it should be treated by aspiration of the contents. While thus preventing torsion, it is though best to observe course of such ovarian cysts.

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