Logic has been cast aside as some geneticists have got more than a little carried away in trying to subdivide ME/CFS into genetic subtypes. Firstly I would like to state that I am not of the opinion that everyone with the ME/CFS label has nothing medically wrong with them.
However I think it is completely stupid to claim that all people with a ME/CFS label have the same 'disease', as the 'disease' has no specific symptoms, no specific signs, and no decent diagnostic tests. I think the medicalisation of these kind of so called 'diseases' as discrete entities when one cannot even define what the 'disease' is creates far more problems than it solves. That is not to say that many of these people do not have very real pathologies, however to lump them all together under the ME umbrella is nothing but foolish and short sighted as we are no way near understanding this condition as yet.
There are other conditions that are very poorly defined and hence come into the same trouble as ME/CFS, many of them rather vague and sometimes bogus psychiatric diagnoses, and one can't help but feel that the diagnosis of Irritable Bowel Syndrome is another steaming pile of poorly understood conditions that have been lazily dumped together in an attempt to feign a pretence for understanding things that are simply not yet understood.
Back to the case in hand, how on earth can geneticists claim to be able to subdivide up a condition into genetic subtypes when they cannot even define or diagnose this condition in the first place? I would argue that they cannot. More importantly pretending to understand things that are not understood is dangerous, as it prevents people from openly and honestly trying to understand these conditions better, as anyone who questions the existence of ME/CFS as a discrete pathological entity is written off in a rather annoying politically correct fashion.
There are also many cases of people who have had clear diagnoses missed and then been inappropriately labelled with ME or IBS, meaning that their real diagnosis went untreated. Also the more we medicalise the poorly understood then the more normal people with no problems will become medically labelled, and then start acting up to their label; I don't think this is a good thing either. The worried well will be happy though, the ever growing band of fashion conscious Gluten avoiding bored housewives will have a new act to follow.