Genitourinary Radiology > Adrenal Glands > Adrenal Cyst

Adrenal Cyst

Adrenal cysts are rare, benign, and usually nonfunctional. They tend to be large at presentation (> 6 cm), and may be difficult to distinguish from exophytic upper-pole renal cysts.  They are often the sequellae of prior adrenal trauma or hemorrhage. These do not contain an epithelial wall but rather a fibrous sheath and are therefore referred to as pseudocysts.

Enhanced CT scan of the abdomen. Right adrenal mass is primarily water attenuation. It is contained within the body of the adrenal gland (arrow), and there is a thin calcification in the cyst (or pseudocyst) wall.

The same patient as in the image to the left.  This gray scale sonographic image shows a predominantly simple fluid containing structure in the right suprarenal space adjacent to normal liver (L).

This heavily calcified mass in the left adrenal gland (arrow) is seen on enhanced CT scan. This mass is likely the result of prior hemorrhage or infection (especially Tb) with subsequent calcification.

Bone windows of the same CT scan as above shows to better advantage the thickly calcified wall of this adrenal pseudocyst.

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