Clinical Features and Treatment Considerations of Dissociative Identity Disorder in Teenagers

Introduction and Definitions of Dissociation

• Conceptual Overview of Dissociation:

  • Dissociation is characterized as a unique and historically controversial phenomenon within the field of psychiatry.

  • Historically, discussions from the early $19^{\text{th}}$ century framed dissociation along a spectrum ranging from hypnotic or hysterical phenomena to the modern understanding of its relationship with trauma.

  • Verbatim Definition: Dissociation is defined as a form of psychological defense against a psychologically traumatic experience that leads to the disintegration of a person’s thoughts, memories, feelings, actions, or sense of self-identity.

• Diagnostic Classifications (DSM-5):

  • The American Psychiatric Association’s Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) categorizes dissociative disorders into three primary types:

    1. Dissociative Identity Disorders (DIDs).

    2. Dissociative Amnesia.

    3. Depersonalization/Derealization Disorder.

• Characterization of Dissociative Identity Disorder (DID):

  • Formal Identification: Previously known as "Multiple Personality Disorder."

  • Clinical Features: It is a complex, chronic condition typically linked to childhood trauma. The presentation involves the disruption of identity by $2$ or more distinct personality states.

  • Affected Domains: This disruption results in disturbances in the sense of self, memory, affect, behavior, perception, cognition, and/or sensory-motor functioning.

Epidemiological Statistics and Clinical Recognition

• Prevalence in Psychiatric Settings:

  • Outpatient Clinics: Approximately $2\%$.

  • Inpatient Units: Approximately $5\%$.

  • Emergency Settings: Prevalence rates are reportedly higher than in standard inpatient units.

• Adolescent Statistics:

  • A survey of hospitalized adolescents revealed a DID prevalence of $16.4\%$.

  • Among these adolescents, a considerable majority (93.9\%\) were concurrently diagnosed with another primary psychiatric condition.

• Diagnostic Challenges:

  • Assessment is primarily clinical and involves the systematic exclusion of other causes such as epilepsy or substance use.

  • Despite their prevalence, dissociative symptoms are frequently poorly recognized, leading to low identification rates and inadequate integration into treatment plans.

Case Study 1: DID Comorbid with Autism Spectrum Disorder (ASD)

• Patient Profile: A $16$-year-old boy with high-functioning Autism Spectrum Disorder (ASD).

• Clinical Presentation:

  • Referred for a $6$-month episode of worsening depressive symptoms including loss of interest, poor sleep, appetite loss, and poor concentration.

  • Progressed to recurrent catatonia characterized by mutism, psychomotor retardation, negativity, and reduced oral intake.

  • Medical workup (blood tests and neuroimaging) showed no abnormalities beyond mild dehydration.

• Dissociative Identity History:

  • Symptoms emerged at age $5$, precipitated by parental conflicts and school bullying.

  • By age $16$, the patient identified $7$ distinct identities, each with unique names, characters, interests, temperaments, and emotional sets.

  • Identities emerged in response to specific trauma: being bullied for autistic behavior, losing friends, or separation from family.

  • The patient described the identities as being present in his mind rather than experiencing them as hallucinations or delusions.

  • Therapeutic Barriers: His underlying ASD reduced his emotional resilience and limited his psychological awareness, making it difficult for the treating team to explore trauma-oriented interventions or integration.

• Pharmacological Management:

  • High-dose Lorazepam: Used for the management of catatonia.

  • Risperidone ($0.5\,mg$ at night): Used for agitation and behavioral problems.

  • Fluoxetine ($20\,mg$ daily): Prescribed for depressive symptoms.

Case Study 2: DID and Severe Mood Dysregulation

• Patient Profile: A $17$-year-old Malay female student with a history of childhood trauma.

• Clinical Presentation:

  • Admitted for suicidality, anxiety, and mood symptoms.

  • Reported fragmentation into identities since age $6$ following bullying.

  • Identities Identified: Seven total, including a $15$-year-old "troubled teenager and seductive killer," and two children aged $6$ and $9$ (one depressive, one hyperactive).

• Psychosocial Management:

  • The primary challenge was facilitating her return to school for major examinations.

  • Collaboration occurred between parents, patient, and school administration to create safety contingency plans.

  • The patient and her alters were encouraged to reduce "switching" while on school grounds.

• Clinical Investigations and Interventions:

  • MRI, EEG, and blood tests were normal.

  • Medication Regimen:

    • Fluoxetine ($60\,mg/day$) for depression and anxiety.

    • Risperidone ($3\,mg/day$) specifically for impulsive behavior and aggression.

Case Study 3: Dissociative Amnesia and Successful Integration

• Patient Profile: A $16$-year-old Malay female student with an introverted personality.

• Clinical Presentation:

  • Experienced an amnesia attack on the first day of school following the COVID-19 Movement Control Order (MCO).

  • Woke up and gave parents a "bear embrace" and a kiss, as if she hadn't seen them in a long time, despite being in the same house.

  • Retrospective memory displayed lapses of approximately $6$ months.

• Dissociative Identity History:

  • Began in primary school as "imaginary friends" used to calm her down after verbal bullying.

  • Six identities reported, including a seductive adolescent and a depressed girl.

  • Risk factor: The seductive identity sent inappropriate photos to a male friend, causing the patient significant distress when she became aware of it.

• Outcome and Protective Factors:

  • Integrated fully after $18$ months of treatment.

  • Unlike cases involving extreme repeated trauma, her symptoms responded quickly to supportive psychotherapy and Fluoxetine ($20\,mg/day$).

  • Protective factors included a strong, empathetic, and committed family support system.

Etiological Models and Neurobiology

• The Biopsychosocial Paradigm: DID is viewed as an exemplary model for the biopsychosocial paradigm because it stems from developmental adverse events (trauma) combined with neurobiological changes.

• Dual Etiology Models:

  1. Trauma Model: Linkages to chronic neglect, physical violence, and sexual violence in childhood. Duration of abuse and age of onset are strongly correlated with DID severity.

  2. Fantasy Model: Suggests DID can be simulated through high suggestibility, prone imagination, and sociocultural influences.

• Neurobiological Findings:

  • MRI studies indicate a decrease in the size of the limbic system, specifically the hippocampus and amygdala.

  • Decreased function in the orbitofrontal cortex.

  • Associated with decreased cerebral blood flow.

Comprehensive Management Principles

• Core Principles of Care:

  • Individualized Treatment Plan: Must account for developmental stage, trauma history, and individual strengths.

  • Psychotherapy: Primarily the first line of treatment. Modalities include Play Therapy, Cognitive-Behavioral Therapy (CBT), and Supportive Therapy.

  • Trauma-Focused Intervention: Utilizing Trauma-Focused CBT (TF-CBT) or Eye Movement Desensitization and Reprocessing (EMDR) to process traumatic memories.

  • Coordinated Care: Requires constant communication between therapists, psychiatrists, and schools.

• Role of Pharmacotherapy:

  • Medication is used wisely as an adjunct to treat comorbid conditions (depression, anxiety, sleep issues).

  • Continuous care is essential, as the treatment for DID often spans several years.

Conclusion and Implications for Practice

• Early identification of dissociative symptoms is critical for proper diagnosis and effective treatment integration.

• Treatment for DID is often complex and lengthy, but with appropriate psychotherapy and support, individuals can achieve significant functional improvement.

• There is an expressed need for more evidence-based management strategies for special populations, such as adolescents with comorbid neurodevelopmental disorders like ASD.

Summary:

Dissociation is a psychological defense mechanism against trauma, resulting in disintegration of thoughts, memories, and sense of self. The DSM-5 categorizes dissociative disorders into Dissociative Identity Disorder (DID), Dissociative Amnesia, and Depersonalization/Derealization Disorder. DID is linked to childhood trauma and characterized by the presence of two or more distinct identities. Epidemiologically, it has a prevalence of around 2% in outpatient settings and 16.4% among hospitalized adolescents. Case studies highlight the complex nature of DID, especially when comorbid with conditions like Autism Spectrum Disorder and severe mood dysregulation. Management strategies involve individualized treatment, primarily psychotherapies such as Trauma-Focused CBT and medications for comorbid conditions. Early identification and tailored interventions are crucial for improving functional outcomes in those with dissociative symptoms.