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Transient Fetal Sternal Dermal Cyst

Report of 2 Cases and Literature Review

Ultrasound Unit, Department of Obstetrics and Gynecology, Chaim Sheba Medical Center, Tel Hashomer, Israel; affiliated with the Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.

Address correspondence to Yinon Gilboa, MD, Ultrasound Unit, Department of Obstetrics and Gynecology, Chaim Sheba Medical Center, 52621 Tel Hashomer, Israel. E-mail: yinon-si{at}inter.net.il

Objective. The purpose of this series was to describe the prenatal diagnosis and pregnancy outcome of fetuses affected by a transient idiopathic fetal sternal cyst. Methods. Two fetuses had the diagnosis of an isolated presternal cyst at routine sonography at 15 weeks. A follow-up sonographic examination was done, and the neonates were examined after birth. Results. In both cases, the cyst disappeared at 20 weeks’ gestation, and both fetuses had only a small dimple at the location of the cyst. Conclusions. An isolated presternal cyst is an extremely rare finding. It should be followed sonographically, and if it disappears within a few weeks, the diagnosis of a dermal inclusion cyst should be suspected. Parents can be informed to anticipate a small depression on the neonate’s chest.

Key Words: prenatal diagnosis • sonography • sternal cyst