Borderline Personality Disorder or First-Episode Psychosis? Challenges in Assessing Psychotic Features in Early...

Area of Science:

• Psychiatry
• Developmental Psychology
• Clinical Psychology

Background:

• Adolescence is a critical developmental stage for the emergence of borderline personality disorder (BPD) and first-episode psychosis.
• Transient psychotic symptoms are diagnostic criteria for BPD, but their progression to schizophrenia is not well understood.

Purpose of the Study:

• To explore the diagnostic and follow-up challenges of psychotic features in adolescent BPD.
• To examine the differentiation between stress-related psychotic symptoms and emerging psychosis.

Main Methods:

• Two case studies of adolescent girls (aged 14 and 15) initially diagnosed with BPD using semi-structured interviews.
• Longitudinal assessment five years later using comprehensive diagnostic interviews to track symptom development.

Main Results:

• Both cases showed initial reality testing lapses, interpreted as transient.
• Difficulty in distinguishing normative imaginative thinking from pathological beliefs in youth was highlighted.
• One case demonstrated progression of psychotic features into adulthood, posing challenges for psychosis threshold determination.

Conclusions:

• Enhanced clinical training is needed for differential diagnosis and management of psychotic features in early BPD.
• A continuous monitoring strategy for BPD with psychotic features is proposed to facilitate early intervention.
• Addressing this diagnostic gap can improve access to early intervention for first-episode psychosis.