Borderline Personality Disorder in adolescence (BPD-A) is a valid and reliable, yet controversial diagnosis. Less than 10% of clinicians are actively diagnosing BPD-A which leaves as many as 22% of outpatient and 49% of inpatient adolescents meeting criteria undiagnosed and inadequately treated. Lack of diagnosis delays evidence-based treatment resulting in developmental arrest, polypharmacy, prolonged hospitalizations, and poorer long-term outcomes. Recent longitudinal studies have identified antecedents and behaviors in preschool children as well as stable BPD symptoms in 12-year-olds which strongly correlate with impairing BPD symptoms, poorer psychosocial functioning, and eventual BPD diagnosis in early adulthood. Misinformation and lack of appropriate training, in both diagnostics and clinical management, may be preventing timely diagnosis and effective. This continuing education activity will engage learners in self-reflection and case study application to achieve the following learning outcomes: