Panic disorder with agoraphobia:

Panic disorder is characterized by repeated and unpredictable attacks of intense fear and anxiety. Agoraphobia, literally "fear of the marketplace", develops from a panic disorder in more than one-third of cases.
- Reviewed last on: 12/15/2008
- Linda Vorvick MD, Family Physician, Seattle Site Coordinator, Lecturer, Pathophysiology, MEDEX Northwest Division of Physician Assistant Studies, University of Washington School of Medicine; and Timothy A. Rogge, MD, private practice in Psychiatry, Kirkland, Washington. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.