I am a 21 year old male, who after suffering from a lifetime of migraine headaches, vision problems e.g. diplopia, strabismus, fine motor skill problems, sensory integration issues, neck pain etc, central sleep apnea and a circadian rhythm disorder. I have had these issues my entire life but they seem to have gotten significantly worse in the last 5 years or so, to the point that I could no longer function normally. I was recently told that my symptoms closely mirrored those of someone with a chiari malformation and had an upright MRI done to evaluate if this could be the cause of my symptoms. My cerebral tonsils appear low as much as 5 mm in some images but this one in particular puzzles me as it seems to show a distinct but faint shape extending down from my cerebellum almost 17 mm. I am puzzled as to what this is and if it could be causing some of my symptoms. Any help anyone could provide in interpreting the image would be greatly appreciated.