Non-Invasive Assessment of Atherosclerosis in Patients With CGD and Other Disorders of the Immune System

Background: * Atherosclerosis, the arterial plaques or blockages that cause heart disease, develops in many people by the time they are in their mid-20s. The rate of atherosclerosis in patients with immune system disorders has not been well studied, but it may be very different from the general population. * Patients with chronic granulomatous disease (CGD) produce less of a group of molecules known as free radicals, which help to fight infection and may play a role in the development of atherosclerosis. Patients with CGD may develop atherosclerosis much more slowly than people without CGD. On the other hand, carrier mothers of children with genetically-linked CGD often have problems with autoimmune problems in addition to a problem with making free radicals. Patients with other immune system disorders also have very different responses to infection, and many of them also have autoimmune-like problems that may change the risk of developing atherosclerosis. Objectives: \- To study the prevalence of atherosclerosis in patients with immune system disorders, compared with healthy individuals. Eligibility: \- Individuals at least 18 years of age who either have been diagnosed with an immune system disorder or are healthy volunteers. Design: * The active part of the study involves one or two visits to the National Institutes of Health Clinical Center for a series of imaging tests and scans. * Participants will have the following tests during the active part of the study: * (1) CAT scan to obtain images of the chest arteries and measure the amount of calcium in the artery walls. * (2) Magnetic resonance imaging scan to obtain images of the coronary and carotid arteries in the chest and neck. * (3) Electrocardiogram to provide data on current heart function. * (4) Blood samples to provide data on heart, kidney, and immune system function. * Participants will be contacted every 2 years in the future for up to 30 years to determine whether they have developed heart dis