Cysts are benign most of the time, even complex cysts. Have you seen your doctor about it? What did he/she suggest the next step should be? Once it reaches 5 cm or bigger, they consider surgically removing it. Talk to your doctor about it. But try not to worry too much until you get more questions answered. Cysts are not too much to worry about most of the time; just a hassle to deal with. Good luck :)
what did your doctor suggest?