This volume is designed to help clinicians assess medical conditions which are "masquerading" as psychological ones. The author provides essential clues to our understanding of organic disease and shows how to look for these clues during the clinical interview process. Common clinical pitfalls, simple assessment tests, and over 100 case studies are included. New to this edition: obsessive/compulsive disorders; the "love delusion"; postictal psychosis; an update on AIDS; dementia complex; atypical neuroleptics; SSRI's and newer general medications; and alternative medicine section; multiple sclerosis; ADHD; Lyme's disease; and an updated bibliography and references.