@cstruter thank you for sharing your very clear letter.
This is such an important issue. Undoubtedly patients being diagnosed as FND have very real symptoms, but there is a danger that an FND diagnosis shuts down other investigations, preventing identification of misdiagnoses.
I have before given the example of a friend on mainland Europe who experienced severe chest pain every time she bent forward following heart surgery. She was repeatedly told there was no organic basis for the pain, advised to push through the pain, to exercise more and offered counselling. Fortunately she ignored this advice and after over eighteen months of ‘doctor shopping’ did manage to get an X-ray that identified the eleven inch stainless steel surgical instrument sitting in her chest cavity.
We have no idea how often an FND diagnosis obstructs the diagnosis of an alternative potentially disabling or life threatening condition.