This introduction to the Marfan syndrome, a heritable disorder of connective tissue primarily affecting the bones and ligaments, eyes, cardiovascular system, and lungs, is intended for a general audience. The question-and-answer format was chosen by individuals with the syndrome to reflect their major questions and concerns. It incorporates the experiences of patients, relatives, and health professionals. Topics addressed include: skeletal features; effects on the eyes; cardiovascular features; other features; causes; diagnosis; who can be affected; potential for a cure; the most effective forms of treatment; the outlook and lifestyle for affected persons; common parent reactions; common reactions of affected adults; reactions of teenagers and young adults; family concerns; use of medications or special diets; how the syndrome is passed in families; the decision of affected persons to have children; need for informed physicians in routine medical care; current research; and organizations providing support and information. (MSE)