|
Etiology |
Prevalence of the different entities among adrenal incidentalomas |
|
Adrenocortical adenoma or macronodular bilateral adrenal hyperplasia |
80%-85% |
|
Nonfunctioning |
40%-70% |
|
Mild autonomous cortisol secretion |
20%-50% |
|
Primary aldosteronism |
2%-5% |
|
Overt Cushing's syndrome |
1%-4% |
|
Other benign mass: Myelolipoma |
3%-6% |
|
Cyst and pseudocyst |
1% |
|
Ganglioneuroma |
1% |
|
Schwannoma |
<1% |
|
Hemorrhage |
<1% |
|
Pheochromocytoma |
1%-5% |
|
Adrenocortical carcinoma |
0.4%-4% |
|
Other malignant mass (mostly adrenal metastases): |
3%-7% |
Table 2: Quality and Significance of the Four Levels of Evidence in GRADE

Table 3: Factors that Determine How to Upgrade or Downgrade the Quality of Evidence
