I have a close friend diagnosed with FTD several years ago though her doctors acknowlege there is no definitive test for FTD except through a post-mortem autopsy. Like a number of diseases, an FTD diagnosis, in advance of an autopsy, is an educated guess. For this reason, it is particularly critical to stay open to possibilities, as similarly presenting conditions can be missed and not treated.
In my friend's case, she presents nothing like an MLCer, but does have a number of the physical and cognitive symptoms outlined at the Association for FTD website:
http://www.theaftd.org/understandingftd/diagnosisSince absolutely no one, including knowledgable scientists and doctors, can know that anyone does or does not have FTD until the brain is looked at after death, it is very important for each person to do his or her own research.
Some highlights from the Association for FTD website that may be helpful are:
FTD is a form of early onset dementia and, like Alzheimer's it is characterized by brain atrophy and gradual loss of brain function.
FTD is primarily a disease of behavior and language dysfunction.
FTD patients exhibit behavioral and personality changes, but retain cardinal features of memory. Some FTD patients may have only language dysfunction and the pattern of language loss may be specific, such as an inability to name a familiar, everyday object.
FTD patients are more likely to display early motor abnormalities, such as difficulty walking, rigidity or tremor (similar to Parkinson disease), or muscle atrophy and weakness.
It is important to understand the distinction between clinical diagnosis of FTD and pathological diagnosis. A clinical diagnosis is carried out by the physician meeting with the patient and family and detailed examinations of changes in cognition, behavior and personality, and neuroimaging studies.
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A pathological diagnosis is determined through autopsy, and requires looking at the brain tissue under a microscope. It is during this examination that physicians can determine the specific type of abnormality present in the brain, and thus the definitive cause of the progressive symptoms experienced during life. A definitive (or an official) diagnosis of FTD can only be made via autopsy.[/u]"
"There are many potential causes that may explain changes in cognition, behavior and motor skills.
No single diagnostic test exists to confirm or rule out a diagnosis of FTD. This often results in a long and frustrating process of testing for other disorders with symptoms similar to FTD to rule them out. It is not uncommon for an individual’s diagnosis to change multiple times. Research is still looking for a definitive test for FTD."
I agree with those who have said that what we refer to as MLC is a cluster of symptoms and behaviors that may indicate a variety of issues and conditions that are psychological, physical, emotional and spiritual in nature. There is MUCH we do not know and each person, their genetics, family/personal/medical histories are different, etc.
Personally, I think it's helpful to stay open without forcing any one cause onto anyone. MLC is likely a complicated, multi-layered issue with varying triggers resulting in some similar behaviors, but not necessarily similar outcomes--physical or otherwise. In my own case, I am a third generation LBS, with the interesting medical/genetic part being that the LBS are related through my maternal line, but none of the MLCers are connected biologically. So perhaps there is also a genetic or Family of Origin issue in who we are drawn to, a pattern of choices or lack of self-worth, repeat effort to fix past family issues via our own marriage, or a subconscious "magnetism" to what is familiar to us even when ultimately not in our best interest. My mom vowed not to marry a man who would cheat and abandon, yet somehow she did. I did the same, and could not have married someone who seemed more different in personality and priorities than my father. Yet, 25 years into knowing one another, my H ended up with almost identical behaviors/demeanor/rationale, etc. to my father during his own MLC. While I am in no way blaming the victim, I believe it's imperative to look at ourselves as LBSs as well, and our own history, particularly for me as the mother of a daughter who I hope can break what appears to also be a generational pattern among the women. I can't help her, and she can't help herself, if we are unwilling to look at this from all angles.
For me personally, I also tread carefully about too much dependence on pathologizing MLC as solely a medical issue. It's too simplistic, in my opinion, and may be more about our need as an LBS to avoid looking inward, whether about our own issues and choices, so we don't feel others can "blame" us or point to flaws in ourselves that may have contributed to issues over the course of our marriages. It is less painful, in some ways, to be able to point at a medical condition beyond our control and our spouse's rather than a spouse wanting a different life, not being happy, not wanting to stay married, falling out of love, choosing to betray us. etc. But in the case of my exH, that would also mean a terminal illness which, for me, far outweighs any comfort of absolving I might gain.
In my family's case, none of the MLCers exhibited any brain atrophy, the physcial or degenerative symptoms of FTD, etc. and they lived decades beyond the BD, maintaining second marriages, successful careers, friendships, etc. What they did have in common, is what I've observed in a good number of male MLCers in particular, which is a history of conflict avoidance, poor communication, avoiding help/therapy, and compartmentalizing which can also contribute to destructive behavior over the long-haul (reaching a tipping or boiling point so to speak). My own exH is 7+ years past BD, a total vanisher--including with his daughter--but otherwise doing very well and still with the OW. It does me and my D no good to focus on him being "unwell." He's chosen a different life for whatever reason and whether is be completely free will and or mental/physical issues, I cannot control or impact that. His health and life are is and my life, and my daughter's, are better served by living them.
Phoenix