Conversion Disorder involves one or more symptoms of altered voluntary motor or sensory function that are, on clinical evaluation, incompatible with recognized neurological or medical conditions -- there is no actual diagnosed medical condition producing the symptom. Psychological Factors Affecting Other Medical Conditions involves psychological or behavioral factors that adversely affect an ACTUAL, diagnosed medical condition -- for example, by influencing its course, interfering with its treatment, or constituting an additional, well-established health risk.
Conversion Disorder's onset is often acute, sometimes associated with a psychological stressor, and centers on the emergence of the functional symptom itself. Psychological Factors Affecting Other Medical Conditions applies at any point in the course of a diagnosed medical condition, whenever psychological or behavioral factors begin to adversely affect it.
Conversion Disorder's diagnosis rests on clinical evaluation of the functional symptom's incompatibility with neurological disease, without a fixed minimum duration specified. Psychological Factors Affecting Other Medical Conditions requires a close temporal association between the psychological/behavioral factors and the worsening of, or risk to, the medical condition -- but likewise no fixed minimum duration.
Conversion Disorder is associated with the specific functional presentation (weakness, abnormal movement, sensory loss, or seizure-like episodes) and neurological exam findings demonstrating internal inconsistency. Psychological Factors Affecting Other Medical Conditions is associated with identifiable psychological or behavioral patterns -- denial of symptom severity, poor treatment adherence, stress-related physiological reactivity -- that measurably worsen a genuine medical condition's course.
Conversion Disorder's impairment stems directly from the functional neurological symptom itself. Psychological Factors Affecting Other Medical Conditions' impairment stems from the combined burden of the underlying medical condition and the additional harm caused or risked by the psychological/behavioral factors.
Conversion Disorder specifically requires that no actual diagnosed medical or neurological condition explains the symptom. Psychological Factors Affecting Other Medical Conditions specifically requires the presence of an actual, diagnosed medical condition (other than a mental disorder) that the psychological or behavioral factors are influencing -- the opposite structural requirement from Conversion Disorder.
The decisive question is whether there is an actual, diagnosed medical condition involved. When a functional symptom exists without an underlying diagnosed medical explanation, Conversion Disorder applies. When a real, diagnosed medical condition is present and psychological or behavioral factors are adversely affecting its course, treatment, or risk, Psychological Factors Affecting Other Medical Conditions applies instead.
Both disorders involve psychological factors intersecting with physical health, which can blur the distinction, but the presence or absence of an actual diagnosed medical condition is the deciding structural feature -- Conversion Disorder is diagnosed in its absence, and Psychological Factors Affecting Other Medical Conditions requires its presence.
A person develops sudden blindness with no ophthalmological or neurological explanation found on thorough workup -- Conversion Disorder. A person with diagnosed asthma repeatedly skips prescribed medication due to anxiety about side effects, resulting in worsening asthma control and emergency visits -- Psychological Factors Affecting Other Medical Conditions.
| Feature | Conversion Disorder | Psychological Factors Affecting Other Medical Conditions |
|---|---|---|
| Underlying medical condition | No actual diagnosed medical condition explains the symptom | An actual, diagnosed medical condition is present and required |
| Role of psychological factors | Produce the functional symptom itself, in the absence of organic disease | Adversely affect the course, treatment, or risk of a genuine medical condition |
| Clinical confirmation needed | Findings of incompatibility with recognized neurological/medical conditions | A close temporal and causal association between the psychological factors and the medical condition's course |
One or more symptoms of altered voluntary motor or sensory function (e.g., weakness, abnormal movements, seizure-like episodes, sensory loss) that is incompatible with recognized neurological or medical conditions on clinical examination, and not deliberately produced.
A diagnosis used when psychological or behavioral factors adversely affect a diagnosed medical condition by influencing its course, interfering with treatment, contributing to health risks, or affecting the underlying pathophysiology -- distinct from a somatic symptom disorder, since a genuine, diagnosed medical condition is present.