At the outset, Marfan attempts to define the disease about which he writes, and he does so with the degree of success that has been attained by all others who have attempted the same thing; his definition is not a definition but a description in brief. The book that follows deals with the description in great detail from a clinical and pathologic standpoint; he then enters the field of physiology and attempts to explain it, and to bring all that is obscure into one satisfying hypothesis. Finally, there is a chapter on differential diagnosis and one on treatment.
Most writers have made two errors when dealing with this disease. One is an error that comes from too little attention to definition, and those who have made it have thought they have found the cause of recurrent or cyclic vomiting in chronic appendicitis, eye strain, postural defect and other conditions, when