Probably every doctor's worse fear (other than harming a patient) is getting sued, but overall, only 1% of total claims studied found a verdict for the plaintiff (29% of cases were settled with some payment to the plaintiff).
Did you know that in the Emergency Department, only 19% of claims were actually attributable to Emergency Medicine physicians.
The most common ED lawsuits involved acute myocardial infarction and appendicitis (missed diagnoses).
To read more about this issue, check out a breif article I wrote in What's Up in Emergency Medicine: http://www.emra.org/emra_articles.aspx?id=43544
The Litigators Lions Pit: The Top 10 Medical Malpractice Issues Every Resident Should Know