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Arterial embolization of malignant tumor: report of two cases with angiographic findings.

Two patients with malignant arterial emboli, one from a renal cell carcinoma and the other from a squamous cell carcinoma of the trachea, are described. Both patients had typical radiographic features of emboli on angiography. The origin of such arterial emboli is most probably a chest metastasis involving a pulmonary vein.