Fig. 3.

Control (case 7) - sham operation without common bile duct ligation.

A. Transverse thin-section CT scan obtained at the same level as Figs. 1 and 2A, showing no evidence of a dilated peripheral pulmonary vessel (arrow) compared with vessels at the same level in Figs. 1 and 2A.

B. Pulmonary angiographs obtained at a 25 degree oblique angle showing no evidence of tortuosity of the right basal arteries (arrow).

C. Immunostaining for endothelial nitric oxide synthase in the right lower lobe near the level of A. Vascular endothelial cells show slight immunoreactivity but no definite pneumocyte immunostaining (score 0).