In spite of the widespread use of obstetrical sonography, the prenatal
detection of presumed adrenal hemorrhage remains extremely unusual.(1
-4) Pathologic proof is rare.(2,4) Several authors have noted adrenal
calcifications at birth and have speculated that they represent the se
quelae of prenatal adrenal hemorrhage. However, without pathologic pro
of, differentiation from spontaneously resolved neuroblastoma is not p
ossible.(5-7) We present a case of adrenal hemorrhage initially detect
ed as a predominantly cystic mass with prenatal sonography at 28 weeks
. The mass persisted on sequential prenatal sonograms with an increase
in size and a change in internal architecture, from primarily cystic
to complex with cystic and solid elements. Postnatal sonography and co
mputed tomography (CT) on the first day of life confirmed a complex cy
stic and solid mass. Persistence of a suprarenal mass without signific
ant decrease in size, in combination with a complex sonographic appear
ance, led to a presurgical diagnosis of cystic neuroblastoma; however,
adrenal hemorrhage was found at surgery.