Abstract
The purpose of the study was to find out how reliably benign and malignant adrenal tumours can be differentiated on the basis of CT characteristics. The material included 86 adrenal tumours with the following confirmed diagnoses: 48 primary adrenal tumours (8 carcinomas, 1 neuroblastoma, 4 pheochromocytomas, 31 adenomas, 3 cysts, 1 haemangioma) and 38 metastases. The size, density, homogeneity, enhancement and growth of the tumours were evaluated. No specific CT findings could separate benign from malignant tumours. Coexistence of cancer and bilateral non-homogeneous adrenal masses is probably sufficient for the diagnosis of adrenal metastases. In cases of coincidental small (less than 3 cm), homogeneous and relatively hypodense masses with no signs of hormonal activity, a follow-up examination of the lesion within three months is recommended. Other masses may indicate further diagnostic procedures.
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