Congenital ovarian cyst: report of one case.

The detection rate of ovarian cyst in neonates has been increased through use of prenatal and postnatal ultrasonography. A term female neonate, born to a G1P1 healthy mother, was found to have a cystic mass at the upper pole of the right kidney through prenatal sonographic evaluation. The cyst was also demonstrated to be located in the right pelvis by CT scan after birth. Because of the apparent floating nature of the cyst, laparotomy was performed at the age of seven days. A 4x3x3 cm3 cyst was found in the right ovary. Pathological examination of the cyst revealed a follicular cyst. The thyroid function was also checked before operation and revealed normal.