Hi! We have similar problem - my daughter has arachnoid cyst ~4cm (NMR) in her left temporal lobe, diagnosed with bipolar at age 18, now she is 20, - several maniac episods and hospitalizations. No bipolar in a family. Lithium is not helping as well as depakot, that is unti-convolution medication for mood stabilizing.We visited several neurologists ( as well as several psychiatrists) - they do not believe in the connection between cyst and psychotic symptoms - I believe! There are same articles about this (like, Silva, 2007," Arachnoid cyst in a patient with psychosis : case study", Portugal), however I have not found yet any doctor (or clinic) in USA. I did not try Miao clinic, did you?
Hi! I have a somewhat similar story. My son is 19, recently diagnosed bipolar after having a manic episode. Subsequent to that, we found out he has a 6.5cm X 4cm arachnoid cyst on the right side. My question is, how is your son doing now? Did you see a neurologist? We went to a neurologist, but he discounted that the cyst could be causing behavioral changes. Have an appointment with a neuropsychologist, and am hoping to get some help/answers.
Best of luck to you and your son