Chiari Malformation is considered a comorbidity of Ehlers Danlos- a connective tissue disorder often stemming from MTHFR mutation.
Private genetic testing costs thousands in Canada and although free through the guide and referral of a doctor, it can take years to find a doctor who believes you, and then months for the process of genetic testing. Because of that, I used my DNA data from Ancestry and paid for Promethease, as well as uploaded it to Chatgpt. I was already pretty positive about my having Ehlers Danlos, or at the very least, just unspecified autoimmune disorder. Promethease and chatgpt both showed SNPs relating to or putting me in predisposition for autoimmune disorder and connective tissue disorder (one in the same, really). I have multiple genetic mutations, but MTHFR takes the cake because it can cause mayhem. MTHFR mutation causes the body to not be able to process folic acid (the most commonly pushed supplement for pregnant women especially). The most interesting and relevant piece of information to take away with regarding this post is that according to Ancestry, which is used by millions of people, I have 70% more Neanderthal DNA than other users. Separate from Ancestry, my Promethease report states that I have a brain capacity 2% greater than that of the average person.
Connecting the dots is not difficult if you are determined and can work with the available resources. I'm not sure why it seems that so called "scientists" cannot piece together the very obvious connections when it comes to these things.