Page 891 - Small Animal Internal Medicine, 6th Edition

CHAPTER 50 Disorders of the Adrenal Gland 863

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A B

FIG 50.5
(A) Lateral radiograph from a dog with adrenal-dependent hyperadrenocorticism showing
a calcified adrenal mass cranial to the kidney (arrow). (B) Ventrodorsal radiograph from
a dog with adrenal-dependent hyperadrenocorticism showing a calcified adrenal mass
craniomedial to the kidney and lateral to the spine (arrow). Compression of the abdomen
in the region of the adrenal gland with a paddle has enhanced radiographic contrast,
allowing better visualization of the adrenal mass.

A B

C

FIG 50.6
Ultrasound images of the adrenal gland in three dogs with pituitary-dependent
hyperadrenocorticism (PDH), illustrating the differences in size and shape of the adrenal
gland that can occur with PDH. (A) The adrenal gland in this dog has maintained the
typical kidney-bean shape often identified in normal dogs. However, the maximum
diameter of the gland was enlarged at 0.85 cm. The contralateral adrenal gland was
similar in size and shape. (B) The adrenal gland in this dog is uniformly thickened and
appears plump rather than kidney-bean shaped. The maximum diameter of the gland was
1.2 cm. The contralateral adrenal gland was similar in size and shape. (C) Although the
adrenal gland has maintained some semblance of a kidney-bean shape in this dog, the
gland has undergone marked enlargement, with a maximum diameter of 2.4 cm. The
contralateral adrenal gland was similar in size and shape.