The pituitary gland controls hormones, so tumors there can affect personality by causing the overproduction or underproduction of hormones.
Hormonal imbalances can cause problems with mood
, emotions, body weight
, and sexual function. Patients may also experience headaches and lethargy
. See your neurologist if your cognitive issues worsen. http://www.nlm.nih.gov/medlineplus/ency/article/000704.htm