Factitious Disorder, Illness Anxiety Disorder, and Somatic Symptom Disorder
| Feature | Factitious Disorder | Illness Anxiety Disorder | Somatic Symptom Disorder |
| PEARLS | Factitious = faked symptoms, internal gain (e.g., attention) | Illness Anxiety = fear of illness despite little/no symptoms | Somatic Symptom = actual symptoms + excessive worry about them |
| Symptoms Present? | Yes or fabricated | No or minimal symptoms | Yes — real physical symptoms |
| Intentional? | Yes — symptoms are consciously falsified | No — fears are real, but irrational | No — symptoms are not intentionally produced |
| Motivation | Internal gain (desire to assume sick role) | Anxiety about having or developing illness | Excessive preoccupation with symptoms and distress |
| Insight | Often poor insight into deceptive behavior | Variable insight; patients believe they are ill | Poor insight; patients focus on the physical symptoms |
| Duration | Variable | ≥6 months | ≥6 months (though specific symptoms may change) |
| Associated Behavior | Multiple hospital visits, inconsistent history, dramatic presentation | Frequent doctor visits, health-related checking or avoidance | High health care use, multiple complaints across systems |
| Key Diagnostic Clue | Intentional falsification without external incentives | High health anxiety without significant physical findings | One or more symptoms + excessive health-related thoughts |
| Treatment | Psychotherapy; limit unnecessary medical procedures | CBT is first-line; SSRIs if comorbid anxiety/depression | CBT + regular follow-up; treat comorbid conditions |
| SOMATIC SYMPTOM AND RELATED DISORDERS; NONADHERENCE TO MEDICAL TREATMENT | |
| Factitious disorder |
Patient will present as → a 34-year-old nurse admitted for recurrent hypoglycemia with no clear cause. Workup reveals an elevated insulin level with suppressed C-peptide, and insulin syringes are found in her bag. She has had multiple admissions at different hospitals, and no external reward is identifiable. Patient consciously reports false symptoms, or induces symptoms, with the goal of playing the "sick role"
DX: DSM-5 — falsification of physical or psychological signs/symptoms, or induction of injury or disease, associated with identified deception
TX: Nonconfrontational, supportive approach — a single PCP coordinating with psychiatry
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| Functional neurologic symptom disorder (conversion disorder) |
Patient will present as → a 26-year-old woman with sudden left leg weakness the day after a major argument with her fiancé. Hip extension normalizes when she flexes the opposite hip against resistance (positive Hoover sign), and she walks normally when unobserved. Reflexes, sensation, and MRI are normal. Neurologic symptoms incompatible with recognized disease — diagnosed by positive rule-in signs, NOT by exclusion
DX: DSM-5 — ≥ 1 symptom of altered voluntary motor or sensory function
TX: Deliver the diagnosis positively — name it, explain it is real, common, and reversible, and show the patient their own rule-in signs
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| Illness anxiety disorder (Hypochondriasis) |
Patient will present as → a 45-year-old man convinced he has pancreatic cancer after reading about it online. He checks his abdomen daily and has seen four physicians this year, remaining terrified despite normal exams, labs, and imaging. He has no significant physical symptoms — only the fear. Obsession with the idea of having a serious but undiagnosed medical condition — with few or no actual somatic symptoms
DX: DSM-5 — preoccupation with having or acquiring a serious illness for ≥ 6 months, with somatic symptoms mild or absent
TX: Regularly scheduled visits with a single provider
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| Somatic symptom disorder |
Patient will present as → a 38-year-old woman with years of migrating pain, fatigue, and GI complaints and extensive negative workups. She thinks about her symptoms “all day,” fears something is seriously wrong, and has stopped working — six specialists in 12 months. ≥ 1 distressing physical symptom + excessive thoughts, feelings, or behaviors about it
DX: DSM-5 — ≥ 1 distressing or disruptive somatic symptom plus ≥ 1 of: disproportionate persistent thoughts · persistently high health anxiety · excessive time and energy devoted to the symptoms
TX: A single clinician with regularly scheduled short visits + CBT
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