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Mean diameters of adrenal masses.
| Adrenal mass | No. | Diameter (cm) |
|---|---|---|
| Adenoma | 553 | 2.76±1.69 (1.0–17.2) |
| Pheochromocytoma | 161 | 5.70±3.38 (1.5–20) |
| Myelolipoma | 49 | 5.00±2.34 (1.5–9.3) |
| Carcinoma | 15 | 8.81±5.12 (3.4–21) |
| Metastasis | 37 | 6.88±2.88 (3.4–13.2) |
Diameters are given as means±standard deviations, with ranges in parentheses. The mean diameter of adrenocortical carcinomas was significantly larger than the mean diameters of adenomas, pheochromocytomas, and metastases (P<.001).
