Clinical Scorecard: Understanding Neurological Diseases: A Complex Definition Beyond Simplicity

At a Glance

Key Highlights

• Neurological disease definitions are complicated by symptom-disease confusion, changing diagnostic criteria, shifting terminology, and multifactorial aetiologies.
• Diagnostic criteria changes, such as those in DSM-5 for ASD, have significantly increased diagnosis rates by broadening definitions without new pathological bases.
• Frequent non-scientific changes in clinical classifications disconnect clinical practice from molecular science and cause confusion among clinicians and patients.

Guideline-Based Recommendations

Diagnosis

• Distinguish clearly between symptoms and diseases to avoid conflating manifestations with underlying conditions.
• Be cautious of diagnostic creep caused by changing criteria without new mechanistic evidence.
• Use scientific and mechanistic bases for disease classification rather than arbitrary or societal influences.

Management

• Recognize the multifactorial nature of neurological diseases when planning treatment, considering genetic, environmental, and acquired factors.
• Avoid over-reliance on broad diagnostic categories that may dilute the original disease concept and affect management strategies.

Monitoring & Follow-up

• Monitor changes in diagnostic criteria and classification systems to ensure accurate disease tracking and patient care.
• Stay updated with scientific advances to refine disease definitions and improve diagnostic precision.

Risks

• Risk of diagnostic confusion and overdiagnosis due to malleable criteria and societal influences.
• Potential mismanagement arising from unclear disease definitions and shifting classifications.
• Confusion among patients and non-specialists due to inconsistent terminology and classification changes.

Patient & Prescribing Data

Individuals diagnosed with neurological diseases such as epilepsy, functional neurological disorder, migraine, and ASD

Treatment approaches should consider the heterogeneity and multifactorial causes of neurological diseases, avoiding simplistic symptom-based prescriptions.

Clinical Best Practices

• Apply a rigorous medical model grounded in objective pathology and mechanisms for neurological disease diagnosis.
• Maintain clarity between symptoms and diseases to prevent circular or vague definitions.
• Avoid frequent arbitrary changes in disease terminology and classification without scientific justification.
• Consider multifactorial aetiologies and avoid single-cause assumptions in disease assignment.
• Be aware of the impact of societal and political factors on psychiatric and neurological diagnostic criteria.

References

• No More Normal by Alastair Santhouse
• The Age of Diagnosis by Suzanne O’Sullivan
• Hughlings Jackson's differentiation of classification