Phlebographic investigations were undertaken in patients with mammary cancer and in patients radically operated for the same cancer, in order to study:
1) a participation of the venous blood circulation in the pathogenesis of oedema of the upper limb (chiefly of the post-operation « thick arm »);
2) the possibility of a neoplastic nature (exstrinsic or intrinsic) of the venous lesions.
Some cases are illustrated. A hindered venous outflow may be admitted and the neoplastic nature of the venous lesions appears quite evident.
