borderline personality disorder
(BOR-der-LINE PER-suh-NA-lih-tee dis-OR-der)
A serious mental illness marked by unstable moods and impulsive behavior. People with borderline personality disorder have problems with relationships, family and work life, long-term planning, and self-identity. Symptoms include intense bouts of anger, depression, and anxiety that may lead to self-injury or suicide, drug or alcohol abuse, excessive spending, binge eating, or risky sex. A person with borderline personality disorder who is diagnosed with cancer may be at an increased risk of suicide. Also called BPD.