A HISTORICAL progression of naturally occurring complications and mortality of patients with extremity arteriosclerotic thrombosis is presented by Boyd,1 Hines and Barker,2 and LeFevre.3 Warren et al4 have reported observations in a small group of such patients in contrast to the findings of others. Warren4 noted no correlation between age, serum cholesterol levels, deterioration of symptoms, pulse loss, or progression of disease by arteriographic study. The many surgical procedures currently utilized to restore arterial femoropopliteal blood flow are well documented. This is a report of 102 consecutive cases of surgically treated femoropopliteal thrombosis followed postoperatively from 12 to 108 months. Review of Cases Of 102 Caucasion patients, 86 were male and 16 female. Six patients were between the ages of 30 and 40 years; 24 were between 40 and 50; 28 were between 50 and 60; 35 were between 60 and 70, and 9 were