Sonography of the circumrenal and horseshoe adrenal gland in the newborn

The adrenal gland can be visualized using ultrasonography in at least 90% of fetuses of more than 26 weeks gestation. The fetal and neonatal adrenal gland is described as a structure having a characteristic V or Y shape. Despite the frequency of visualization of the neonatal adrenal gland, few reports of adrenal anomalies are present in the radiologic literature. The purpose of this paper is to describe and depict the sonographic appearance of the “horsedhoe” and the “circumrenal” adrenal gland and to discuss adrenal anomalies in general.