Book Description
The article is excerpted fromGale Encyclopedia of Medicine.

Consult the second edition of this authoritative, comprehensive, in-depth medical guide for information on more than 1,700 medical topics in language accessible to adult laypersons. Presented in a single alphabetical sequence, articles range in length from one or two paragraphs for minor topics, to several pages or more for major topics. Disease/disorder articles typically cover definition; description; causes and symptoms; diagnosis; treatments; prevention; and more. Test/treatment articles typically cover definition; purposes; precautions; preparation; risks; normal and abnormal results; and much more. This second edition includes more than 200 new entries, 300 updated entries, approximately 650 color images and illustrations, and a comprehensive subject index. New features include biographical and historical sidebars throughout the text.

Disease/disorder articles contain some or all of the following sections:

• Definitions -- brief dictionary-style definition of the disorder
• Descriptions -- overview of the disorder; who gets it and why
• Causes & symptoms -- process, substance or organism that produces the condition; any risk factors that increase susceptibility to the condition; signs and symptoms of the disease
• Diagnosis -- overview of procedures and tests used to diagnose the condition; how the test is done; who should be tested and when; time required; cost; whether it's typically covered by insurance
• Treatments -- overview of conventional methods of care or management of the condition, such as drugs, surgeries, physical therapy, etc.
• Alternative treatments -- overview of alternative/complementary therapies that may be used to treat the condition
• Prognosis -- probable outcome of the disease
• Preventions -- what actions can be taken to prevent the condition from occurring