Malignant paragangliomas of the retroperitoneum: value of computed tomography and angiography.

Four patients with malignant paragangliomas of the retroperitoneum were examined by computed tomography. Angiography was performed in two patients. Computed tomography guided the surgeon in obtaining a biopsy and in considering the possibility of resection. Angiography demonstrated the vascular supply and vascularity of the tumours. Pathological correlation was made.