In the past two years we have operated on an increased number of patients with peripheral pseudoaneurysm. We have observed increasing numbers of in travenous drug abusers seeking medical care. This trend may be due to the fear generated by drug abusers with the acquired immunodeficiency syndrome. Be cause of the dramatic increase in the number of patients with peripheral pseu doaneurysms, due to these patients and civilian violent injuries, we were prompted to analyze the records of the last eleven years to determine the etiol ogy, sites, and types of repairs. Our eleven-year experience with 50 pseu doaneurysms is reviewed.