Personality disorder Borderline personality disorder 2012-08-11T02:26:02Z UMLS:C0006012 ICD-10:F60.3 BPD SNOMEDCT_US:20010003 Emotionally unstable personality disorder HP:0012076 EUPD A personality disorder characterized by impulsive behavior and unpredictable, capricious mood. Affected individuals show a tendency to have outbursts of emotion and an inability to control these behavioral explosions. They generally experience an intense fear of abandonment or instability and also struggle with feelings of emptiness.