This document discusses several types of peripheral vascular diseases including peripheral artery disease, Buerger's disease, Raynaud's disease, and aneurysms. It provides information on the pathophysiology, symptoms, and characteristics of each condition. Key details include that peripheral artery disease involves narrowing of arteries outside the heart and brain, Buerger's disease affects young smoking men and causes inflammation of small and medium arteries in the hands and feet, and Raynaud's disease involves vasospasms of small arteries and arterioles in the fingers and sometimes toes.