Q1 - Not sure about the claims that "Scientific advances are revealing a complex multisystem disease involving neurological, immunological, autonomic, and energy metabolism impairments." and "These range from immune cell and mitochondrial dysfunction to abnormal exercise physiology and visible chemical changes on brain magnetic resonance imaging. Inflammation, oxidative and nitrosative stress, gut mucosal barrier, microbiome and bioenergetics are all altered in ME/CFS".
Q2 - I wouldn't use PENE as a synonym for PEM; it's a fringe term. There's no robust basis for the concept of "neuroimmune exhaustion". It would also be good to add the new NICE criteria & definitions here.
Q4 - alternating diarrhoea & constipation would not make me certain that fibromyalgia was the correct diagnosis here.
Q5 -
Based on his presentation, what further condition might you be most likely to find in a young person wwith myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS)?
...
IBS, hEDS and PoTS may all be relevant co-diagnosis to consider in this case
The symptom list makes no mention of hypermobility or joint pain and, although the patient has abdominal pain the diagnosis of IBS requires altered bowel habit or pain associated with bowel movements. The symptoms described are entirely consistent with (just) ME, and I think it's a mistake generally to present IBS/hEDS/POTS as common co-morbidities.
I hadn't seen the linked reference to a
population based case-control study before, suggesting an increased risk of non-Hodgkin lymphoma in certain CFS-diagnosed populations. In fact, I don't think S4ME has a thread on it...
I also don't think that patients with "pervasive refusal syndrome" necessarily want to die.
Q6 - Taking her BP and HR is obviously necessary but I'm not sure a 10-minute lying/standing BP/HR test tells you much. The patient can probably tell you if she has orthostatic intolerance. With pheochromocytoma and paragangliomata (both mentioned as possible differential diagnoses) the hypertension can be either continuous or episodic but wouldn't necessarily be provoked by orthostatic stress.
Secondly, I don't think ME is associated with a plantar extensor response ("Multiple Sclerosis may present in a similar way to ME/CFS in the early stages of illness and both can display a positive Babinski sign or upgoing plantar reflex.")
Thirdly, I've not looked into the validity or reliability of the diagnostics behind "MCAS" before, but this:
Another differential diagnosis is mast cell activation syndrome (MCAS) which may be detected on serum tryptase and 24-hour urine screen for N-methyl histamine and prostaglandin.
N-methylhistamine is one of the metabolic inactivation products of histamine; it would seem to me that urinary levels would be affected by dietary intake of histamine? And again, not sure about the value of presenting this as a likely diagnosis.
Q8 - If he is struggling to chew and swallow tube feeding might be necessary, but nutrient drinks might well be tried first. Also, a 33 y/o with his third chest infection in 6 months.. has he had a CXR? Lots of things to consider before even placing a NG tube, I think, let alone the recommended PEG.
And "excitatory neurotoxicity of the limbic-hypothalamic-pituitary axis"? No.
There's some good stuff in this CPD, but an overreliance on poor-quality "biomedical" findings, and plenty of comments on hEDS and suchlike which would be better excised.