Conversion Disorder synonyms

Conversion Disorder is officially classified as Functional Neurological Disorder (FND) in modern clinical practice, though it is historically and interchangeably referred to as conversion disorder or psychogenic non-epileptic seizures (PNES) in some contexts. Understanding these various terms is essential for navigating medical records, as the diagnostic label has evolved significantly to better reflect the complex relationship between the brain’s functioning and physical symptoms.

Why does Conversion Disorder have so many different names?

The naming of Conversion Disorder has shifted over time due to advancements in neuroscience and a move away from outdated, stigmatizing terminology. Historically, the condition was referred to as "hysteria" or "hysterical neurosis," terms that are now considered pejorative and clinically inaccurate. Medical professionals currently prefer the term Functional Neurological Disorder (FND) because it emphasizes that the nervous system is experiencing a problem with "functioning" rather than structural damage, helping to reduce the stigma associated with the diagnosis.

What are the common synonyms and historical terms used?

When reviewing medical literature or your own health records, you may encounter several terms used to describe Conversion Disorder. These names reflect different eras of medical understanding or specific symptom clusters:

• Functional Neurological Disorder (FND): The current preferred clinical term.


• Psychogenic Non-Epileptic Seizures (PNES): Often used when the primary symptom is seizure-like activity.


• Dissociative Neurological Symptom Disorder: The term used in the DSM-5 classification.


• Hysteria / Hysterical Neurosis: Outdated, historical terms now largely avoided.


• Psychosomatic Disorder: A broad, older term sometimes used to describe the link between psychological distress and physical symptoms.

How is Conversion Disorder classified in medical databases?

Major medical classification systems have updated their terminology to align with modern research on Conversion Disorder. The ICD-11 (International Classification of Diseases) now categorizes these presentations primarily under "Dissociative neurological symptom disorder." At DiseaseMaps.org, we support a community of 21 individuals living with Conversion Disorder, providing a space for those navigating these complex diagnostic labels to share experiences and peer support.

Next steps

• Discuss your specific symptoms with a neurologist who specializes in Conversion Disorder or FND.


• Request clarification from your provider on which diagnostic code is being used in your chart for Conversion Disorder.


• Join the DiseaseMaps.org community to connect with others who have received a diagnosis of Conversion Disorder.

Medical disclaimer: This information is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment.

References

• NIH Genetic and Rare Diseases Information Center (GARD)


• World Health Organization (ICD-11 Browser)


• FND Hope (International patient advocacy organization)


• American Psychiatric Association (DSM-5-TR)