Psychiatry · Year 3 · from Psychiatry
Case 3: Dissociative Identity Disorder
Patient Demographics
- Age: 34 years old
- Sex: Female
- Occupation: Freelance graphic designer
Chief Complaint
"I keep losing time. Hours go by that I can't account for, and I find things I don't remember doing."
History of Present Illness
The patient is a 34-year-old woman presenting for evaluation of dissociative symptoms. She reports experiencing significant gaps in memory for several years that have recently worsened. She describes "coming to" in unfamiliar locations, finding purchases she doesn't remember making, and discovering writings in her journal in handwriting that is slightly different from her own. She reports that friends and coworkers have told her she sometimes acts "like a completely different person" - more outgoing or more childlike - and she has no memory of these episodes. She has found herself addressed by different names by people who claim to know her.
The patient has a documented history of severe childhood trauma, including physical and sexual abuse by a family member from ages 5-12. She was removed from the home at age 12 and placed in foster care. She reports that she has always had "blank spots" in her childhood memories and has never felt like she had a continuous sense of self.
During the interview, the patient's demeanor shifts noticeably. Her voice becomes higher-pitched, her body language more childlike, and she refers to "the others" who "help protect the body." This alter state identifies as "Lily" and describes the function of keeping traumatic memories separate. After approximately 15 minutes, the patient's demeanor shifts back, and she has no memory of what was just discussed.
Mental Status Examination
Appearance: Initially appropriately dressed professional woman; during switch, posture and mannerisms become childlike
Behavior: Initially guarded, becomes more open; observable switch in identity states during interview
Speech: Variable - initially measured and professional; childlike pitch and vocabulary during alter state
Mood: "Confused and scared" (host); "Okay, I'm just meeting you" (alter)
Affect: Anxious, shifts dramatically during identity switches
Thought Process: Linear during host state; more concrete and childlike during alter state
Thought Content:
- Distress about memory gaps
- No current suicidal ideation (though history of self-harm)
- No homicidal ideation
- No apparent psychotic symptoms
Perceptions: Reports hearing voices "inside my head" (distinct from external hallucinations) that comment on actions or argue among themselves; recognized as internal
Cognition: Oriented to person, place, time; amnesia for alter states
Insight: Developing - beginning to understand the dissociative nature of symptoms
Judgment: Good - seeking help appropriately
Diagnosis
Dissociative Identity Disorder (F44.81)
DSM-5 Criteria Met: A. Disruption of identity characterized by two or more distinct personality states (observed switch during interview, described "others") B. Recurrent gaps in recall of everyday events, important personal information, and/or traumatic events inconsistent with ordinary forgetting (significant time loss, amnesia for alter states) C. Symptoms cause clinically significant distress or impairment (difficulty maintaining employment, relationships, daily function) D. Disturbance not a normal part of cultural or religious practice E. Symptoms not attributable to substance use or medical condition
Comorbid Conditions:
- PTSD (likely, requires formal assessment)
- History of non-suicidal self-injury
Treatment Plan
Safety Assessment:
- Assess each identity state for suicidal or self-harm urges
- Develop internal communication for safety
- Create safety plan that all parts can access
Psychotherapy - Phase-Oriented Treatment:
- Phase 1 (Stabilization):
- Establish safety and therapeutic alliance
- Develop grounding techniques for dissociative episodes
- Improve internal communication between identity states
- Build affect regulation skills
- Phase 2 (Trauma Processing - future):
- Only after stabilization is achieved
- Careful, paced processing of traumatic memories
- Coordination among identity states
- Phase 3 (Integration - future):
- Working toward unified sense of self
- Integration of identity states (not forced, but facilitated)
Pharmacotherapy:
- Sertraline 50 mg daily for comorbid PTSD symptoms
- No medication specifically treats DID, but can address comorbid conditions
Grounding Techniques:
- 5-4-3-2-1 sensory grounding
- Ice cube technique for acute dissociation
- Safe place visualization
Follow-up:
- Weekly individual therapy with trauma-specialized therapist
- Psychiatry monthly for medication management
- Consider group therapy for trauma survivors when stabilized
Image Attribution
Image: Medical illustration depicting the conceptual framework of dissociative disorders and the relationship between trauma, dissociation, and symptom development. Source: Wikimedia Commons. Used for educational purposes under Creative Commons license.