Kangarloo H, Diament M J, Gold R H, Barrett C, Lippe B, Geffner M, Boechat M I, Dietrich R B, Amundson G M
J Clin Ultrasound. 1986 Jan;14(1):43-7. doi: 10.1002/jcu.1870140109.
The sonographic appearance of the normal adrenal gland in children varies with age. In newborns, the cortex is large and hypoechoic, whereas the medulla is relatively small and hyperechoic. With increasing age, the cortex becomes smaller and the medulla relatively larger. The cortex remains hypoechoic and the medulla hyperechoic until age 5-6 months, by which time the gland has become hyperechoic and smaller, with poor or absent sonographic differentiation between cortex and medulla. After 1 year of age, the appearance of the gland is similar to that of the adult gland, with straight or concave borders and a hypoechoic character.
儿童正常肾上腺的超声表现随年龄而异。在新生儿中，皮质大且呈低回声，而髓质相对较小且呈高回声。随着年龄增长，皮质变小，髓质相对变大。皮质在5 - 6个月龄之前一直保持低回声，髓质保持高回声，此时肾上腺已变得高回声且变小，皮质和髓质之间的超声分化差或无分化。1岁以后，肾上腺的外观与成人肾上腺相似，边界直或凹陷，呈低回声特征。
