CLINICAL iNVESTIGATIONS Pulmonary Disease of Vascular Origin*

The differential diagnosis of pulmonary disease of vascular origin must include pulmonary edema, uremia, Loeffler’s syndrome, periarteritis nodosa, Wegener’s granulomatosis, systemic lupus erythematosus, scleroderma, rheumatoid lung, pulmonary hemosiderosis, pulmonary purpura with nephritis, a pulmonary embolism and pulmonary arteriovenous fistula. Puhnonary edema and uremia have been included because of the roentgenographic features (pulmonary vascular congestion, pleural effusion, interlobar collections of fluid) which must be distinguished from those of other vascular disease that cause pulmonary parenchymal inifitrations,