What are the most controversial questions in neurology?

Uncertainty and doubt abound in Neurology. There are many evidence-free areas where experts rub each other the wrong way. These controversies are big and occur in all neurology subspecialties. Controversy-busters have tried for about a decade to iron out these wrinkles on neurology’s face, but the unanswered questions remain. This is why there is a 10th World Congress of Controversies in Neurology (CONy) holding in Lisbon this year.

I want to assure you I have no conflict of interest to declare in this blog. My interest is to explore  which questions have plagued this conference over the last 10 years to pick out the most controversial topics in neurology. To do this I reviewed all previous conference programs and focused on the items that were slated for debate. I looked for practical topics that have remained unresolved, or are just emerging. Here are my top controversial neurological questions:

Raccoon argument II. Tambako The Jaguar on Flikr. https://www.flickr.com/photos/tambako/7460999402
Raccoon argument II. Tambako The Jaguar on Flikr. https://www.flickr.com/photos/tambako/7460999402

 

1st CONy 2007 (Berlin, Germany)

  • Clinically isolated syndromes (CIS): To treat or not to treat
  • Is stem cell therapy an imminent treatment in advanced multiple sclerosis (MS)?
  • Vascular cognitive impairment is a misleading concept?
  • Is mild cognitive impairment a misleading concept?

 

2nd CONy 2008 (Athens, Greece)

  • Can physical trauma precipitate multiple sclerosis?
  • Should patients with Parkinson’s disease (PD) be treated in the pre-motor phase?
  • What is the first line therapy for chronic inflammatory demyelinating polyneuropathy (CIDP)?
  • Is intravenous immunoglobulin (IVIg) effective in chronic myasthenia gravis (MG)?
  • Tau or ß-amyloid immunotherapy in Alzheimer’s disease (AD)?
  • Chronic fatigue syndrome is an organic disease and should be treated by neurologists?

 

3rd CONy 2009 (Prague, Czech Republic)

  • Should cerebrospinal fluid (CSF) be tested in every clinically isolated syndrome?
  • Can we prevent multiple sclerosis (MS) by early vitamin D supplementation and EBV vaccination?
  • Does Parkinson’s disease (PD) have a prion-like pathogenesis?
  • Patients with medication overuse headache should be treated only after analgesic withdrawal?

 

 

4th CONy 2010 (Barcelona, Spain)

  • Camptocormia in parkinson’s disease (PD): Is this dystonia or myopathy?
  • Does chronic venous insufficiency play a role in the pathogenesis of multiple sclerosis (MS)?
  • IVIg or immunosuppression for long-term treatment of CIDP?

 

5th CONy 2011 (Beijing, China)

  • Is sporadic Parkinson’s disease etiology predominantly environmental or genetic?
  • Is multiple sclerosis (MS) an inflammatory or a primarily neurodegenerative disease?
  • Are the new multiple sclerosis oral medications superior to conventional therapies?
  • Is bilateral transverse venous sinus stenosis a critical finding in idiopathic intracranial hypertension (IIH)?

 

6th CONy 2012 (Vienna, Austria)

  • Will there ever be a valid biomarker for Alzheimer’s disease (AD)?
  • Is amyloid imaging clinically useful in Alzheimer’s disease (AD)?
  • Do functional syndromes have a neurological substrate?
  • Should blood pressure be lowered immediately after stroke?
  • Migraine is primarily a vascular disorder?

 

 

7th CONy 2013 (Istanbul, Turkey)

  • Is intravenous thrombolysis the definitive treatment for acute large artery stroke?
  • Atrial fibrillation related stroke should be treated only with the new anticoagulants?
  • Is the best treatment for chronic migraine botulinum toxin?
  • IS CGRP the key molecule in migraine?
  • Is chronic cluster headache best treated with sphenopalatine ganglion (SPG) stimulation?
  • When should deep brain stimulation (DBS) be initiated for Parkinson’s disease?
  • Do interferons prevent secondary progressive multiple sclerosis (SPMS)?
  • Is deep brain stimulation (DBS) better than botulinum toxin in primary dystonia?
  • Are present outcome measures relevant for assessing efficacy of disease modifying therapies in multiple sclerosis (MS)?
  • Should radiologically isolated syndromes (RIS) be treated?
  • Does genetic testing have a role in epilepsy management?
  • Should cortical strokes be treated prophylactically against seizures?
  • Should enzyme-inducing antiepileptic drugs (AEDs) be avoided?
  • EEG is usually necessary when diagnosing epilepsy

 

8th CONy 2014 (Berlin, Germany)

  • Is late-onset depression prodromal neurodegeneration?
  • Does Parkinson’s disease begin in the peripheral nervous system?
  • What is the best treatment in advanced Parkinson’s disease?
  • Are most cryptogenic epilepsies immune mediated?
  • Should epilepsy be diagnosed after the first unprovoked seizure?
  • Do anti-epileptic drugs (AEDs) contribute to suicide risk?
  • Should the ketogenic diet be prescribed in adults with epilepsy?
  • Do patients with idiopathic generalized epilepsies require lifelong treatment?
  • Cryptogenic stroke: Immediate anticoagulation or long-term ECG recording?
Southern Chivalry: Argument Vs Clubs. elycefeliz on Flikr. https://www.flickr.com/photos/elycefeliz/6271932825
Southern Chivalry: Argument Vs Clubs. elycefeliz on Flikr. https://www.flickr.com/photos/elycefeliz/6271932825

 

9th CONy 2015 (Budapest, Hungary)

  • Is discontinuation of disease-modifying therapies safe in  long-term stable multiple sclerosis?
  • Is behavioral therapy necessary for the treatment of migraine?
  • Which is the first-line therapy in cases of IIH with bilateral papilledema?
  • Should patients with unruptured arterio-venous malformations (AVM) be referred for intervention?
  • Should survivors of hemorrhagic strokes be restarted on oral anticoagulants?
  • Will stem cell therapy become important in stroke rehabilitation?
  • Do statins cause cognitive impairment?

 

10th CONy 2016 (Lisbon, Portugal)

  • Which should be the first-line therapy for CIDP? Steroids vs. IVIg
  • Should disease-modifying treatment be changed if only imaging findings worsen in multiple sclerosis?
  • Should disease-modifying therapies be stopped when secondary progressive MS develops?
  • Should non-convulsive status epilepsy be treated aggressively?
  • Does traumatic chronic encephalopathy (CTE) exist?
  • Does corticobasal degeneration (CBD) exist as a clinico-pathological entity?
  • Is ß-amyloid still a relevant target in AD therapy?
  • Will electrical stimulation replace medications for the treatment of cluster headache?
  • Carotid dissection: Should anticoagulants be used?
  • Is the ABCD2 grading useful for clinical management of TIA patients?
  • Do COMT inhibitors have a future in treatment of Parkinson’s disease?

 

Debate Energetico. Jumanji Solar on Flikr. https://www.flickr.com/photos/jumanjisolar/5371921203
Debate Energetico. Jumanji Solar on Flikr. https://www.flickr.com/photos/jumanjisolar/5371921203

 

Going through this list, I feel reassured that the experts differ in their answers to these questions? The acknowledgement of uncertainty allows us novices to avoid searching for non-existent black and white answers. It is however also unsettling that I thought some of these questions had been settled long ago. It goes to show that apparently established assumptions are not unshakable?

Do you have the definitive answers to resolve these controversies? Are there important controversies that are missing here? Please leave a comment

 

3 thoughts on “What are the most controversial questions in neurology?

  1. I should present this list to the next almighty neurologist who writes my husband’s brain damage down as “functional/conversion” after spending 5 minutes with him, even though he has idiopathic angioedema that can cause cerebral vasospasms.

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