Abstract
Adrenal masses occur in 9% of the population and their detection has increased with the expanding use of cross-sectional imaging.The objective in working-up the incidental non-hyperfunctioning adrenal mass is to distinguish benign from malignant lesions.Tumours larger than 5 cm are likely to be malignant and should be biopsied or excised.Adrenal masses with an unenhanced CT density ≤10 HU, or signal drop off on chemical shift MRI, are benign.Tumours that commonly metastasise to the adrenal gland include bronchogenic carcinoma, breast carcinoma and melanoma, with small cell lung carcinoma accounting for 6% of adrenal metastases.
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