I have a 3.4 cm ovarian cyst and am postmenopausal. it grew onehalf cm. if i have to have surgery for ovary out will i experience menopausal symptoms?

Not likely: Since you are already postmenopausal, it is not likely you will change status with this surgery. Your indication for surgery has more to do with making sure the large ovary/cyst is not cancerous.

Ovarian masses: More than likely this is an ovarian tumor (doesn't mean cancer, so don't get upset). Most ovarian tumors are benign and not hormone secreting. You are most likely menopausal already and removing this won't typically cause new menopausal symptoms. The most common benign ovarian cystic tumor is a serous cystadenoma. Make sure your doc has done at least a ca-125 before surgery.