adrenal aldosteronism ( < 3cm)

1- due over-production of adrenal aldosterone.
2-they are usually less than 3cm,usually range between 5 to 35mm.
3-50% have attenuation similar to that near of water(-10 to +10HU).
-a low water attenuation lesion in patient with laboratory proven hyper-aldosteronism should not be diagnosed as an adrenal cyst.

D.D. of adrenal masses with attenuation similar to that of water:
1-aldosteronism.
2-adrenal metastases.
3-non functioning adenoma

adrenal cyst

left adrenal cyst with thick calcification.

adrenal metastases

non functioning adenoma

1-homogenous near water attenuation

ch.ch.of non functioning adenoma.

2-low attenuation of adrenal mass

exclude malignancy.