This is a great question, Sosumi and is at the heart of why we are in such a mess right now.
First regarding the assertion in another post in this thread that CFS is not neurological - it is very true that the term CFS has been applied over time to people that have fatigue do to depression or other issues and as a result has ended up being a wastebasket of a diagnosis. But the Coalition proposal is
not about that wastebasket of diseases. We are talking about the disease we call ME/CFS and sometimes CFS - a serious disease best described today by the ME-ICC or the Canadian Case Definition.
Its clear that
when properly defined, ME/CFS is a neurological illness. The evidence for this is:
- there is a large body of scientific literature that demonstrates the underlying neurological pathologies and many of these articles are specifically demonstrating the difference between ME/CFS patients and depressed patients. These publications variously use the term ME/CFS or CFS. The Coalition proposal has a list of some of those studies over the last 10 years
- the ME-ICC criteria, which defines a neurological disease, states that ME is sometimes referred to as CFS, indicating that they are talking about CFS as a neurological disease.
- a number of ME/CFS experts have specifically stated publically that this is a neurological disease (e.g. Dr Komaroff - meeting with Mass CFIDS in 2010)
Regarding your question of which case definition will be used
My opinion:
I believe the empirical definition has already been broadly denounced. Regarding Fukuda which is broadly used: Fukuda focuses on fatigue and leaves other symptoms which are central to the disease as optional. It was developed in 1994 and we've learned alot in the last 17 years. Its time for Fukuda to be replaced.
So you are left with the Canadian Consensus Criteria and the ME-ICC. Each has its stengths and weaknesses as discussed in other threads in this and other forums (e.g. ME-ICC lacks diagnostic criteria - maybe that is in the physician guides that they haven't issued yet?). But both are a huge advancements over Fukuda and I think ME-ICC is the future.
The bottom line - We need to advocate for the adoption of such a well defined case criteria
and also well defined diagnostic criteria with objective biomarkers to go along with the case definition. That is the only way we are going to get the care that is needed.