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advancedfactitious disordermalingeringsomatic symptom disorderMunchausen syndromeintentional symptom production
A 38-year-old female nurse presents to the emergency department with an apparent seizure. This is her seventh ED visit in 4 months across three different hospitals. Chart review reveals she has injected herself with insulin to produce hypoglycemic episodes and added blood to her urine samples. When confronted with these findings, she becomes tearful but cannot articulate why she engages in these behaviors. There is no pending disability claim, no litigation, and no identifiable external incentive. Between hospitalizations, she actively seeks out new providers and has told friends she has a 'rare medical condition.'
Explanation
The factitious disorder vs. malingering distinction rests entirely on motivation: factitious disorder is driven by an internal psychological need to assume the sick role, while malingering is motivated by external incentives. Both involve intentional symptom production, which distinguishes them from somatic symptom disorder (genuine symptoms, excessive response) and conversion disorder (genuine symptoms, not intentionally produced). Always assess for external incentives before differentiating.
Key Takeaway
Factitious disorder involves intentional symptom fabrication to assume the sick role without external incentives, while malingering involves intentional fabrication motivated by identifiable external rewards.