[Malignant adrenocortical carcinoma with atypical aspect. Value of tomodensitometry and magnetic resonance imaging. Apropos of a case].

A case of large and non-functioning malignant adrenal tumor is reported. It was discovered incidentally during a check-up ordered because of sciatic pain caused by an osteolytic lesion of the sacrum. This huge abdominal tumor was suspected to be an adrenal tumor one the basis of the CT and MR findings. Histological analysis of percutaneous biopsies were unable to define the site and etiology of these two masses. Only histo-pathological examination of the surgical specimen allowed the diagnosis of adrenal cortical carcinoma.