Spontaneous Resolution of Fetal Adrenal Cyst

Abstract

This report describs a female neonate in whom a right suprarenal cyst 20 mm in size was diagnosed by ultrasonography prenatally at 34 weeks of gestation. The cyst showed a tendency to enlarge postnatally for one month, but thereafter it spontaneously decreased in size at the age of 2 months. Adrenal cyst in fetus is relatively rare. Differentiation of a benign cyst from neuroblastoma is of clinical importance, but differential diagnosis is very difficult. It could be ascertain whether the cyst in this case was benign or malignant, but unnecessary surgical procedure could be avoided by careful follow-up for 2 months.