The difference in length, 3.1 to 3.0cm is minimal and can be put down to the Dr/Radiographer determining the edge of the cyst.

The difference with the other measurements, I would say, is that your earlier measurement of 1.6cm was made on a cyst which was tubular. Now, it has expanded by 0.4 and 0.6cm to 2.0cm width and 2.2cm depth, so it is slightly flattened now.

That is just my take on it, but the measurements are definitely showing expansion.

Hope that is easier to understand.

Oh, there are 2.54cm in an inch.

Dave.

If it is getting bigger in three years, I hypothesize that I can get the doctors to believe that it needs to be removed. If it hasn't grown then I will have an uphill battle against the naysayers that believe that AC's are asymptomatic. It's hard trying to determine whether or not to tell the truth in order to secure freedom from ICP.

Mine is at the base of my brain, I have had years of unexplained weakness and numbness on my left side, over and above accident damage. Between '07 and '13 it grew 'significantly' according to my Neuro. I also have early-onset mental issues like Depressive Personality Disorder/Anxiety issues which some attribute to Arachnoid Cysts where present.

Of course, when you have a large lump pressing on parts of your brain, Neuros are loath to admit it may be doing anything at all.

Dave.

This is the part that I do not understand. While I am not familiar with whether or not your cyst can be surgically removed, but if it can, why not do it? It seems that one who is suffering from emotional/mental issues caused by an AC has to suffer through the anxiety until their lives are ruined by the cyst and only when one foot is in the grave and the other on a banana peel will doctors decide to operate. I believe this to be torture. I guess it's just easier to chalk it all up to one being a schizophrenic than to address the cause for the schizophrenia. I wish you luck Dave and I hope they can get you fixed up. I have simply had to learn how to be a productive hermit.