Avi Yavetz from Modi’in suffers from peripheral vascular disease (PVD) and a leg amputation was imminent. However, his son, 27-year-old Snir donated a long vein, which was implanted into his father in a first of its kind operation. Two weeks later and both are doing fine.
http://hadassahinternational.org/first-ever-vein-transplant-from-living-donor-son-saves-fathers-leg/