We appreciate all the kind remarks and suggestions from the many medical students over the past 3 years. Your positive reception has been an incredible encouragement, especially in light of the short life of the Case Files® series. In this fourth edition of Case Files®: Psychiatry, the basic format of the book has been retained. Improvements were made in streamlining many of the chapters and adding proposed DSM-V criteria. Also, numerous clinical cases were rewritten to be representative of more typical patient presentations rather than the “flamboyant” presentation. We debated about whether to group the cases together so that students could compare related disorders, such as cases 1 through 10 would be “personality disorders” to allow for side-by-side comparison. We decided not to use this systematic grouping approach because patients do not present to their doctors in the real world in this manner.
Rather, patients present with symptoms and signs, and it is the “job” of the student and clinician to sort out whether there is a psychiatric issue, and which diagnosis is likely. Nevertheless, the case listing in the back of the book and the index will allow a student to quickly reference similar cases for the sake of comparison. The multiple choice questions have been carefully reviewed and rewritten to ensure that they comply with the National Board and USMLE Step 2 CK format. Some new psychiatric medications have been introduced as well. By using this fourth edition, we hope that the reader will continue to enjoy learning psychiatry through the simulated clinical cases. It is certainly a privilege to be a teacher for so many students, and it is with humility that we present this edition.