nyc lady is correct. Most cysts over 4cm are drained/removed surgically.
In most cases doctors choose to do so via laparoscopy where they make a small incision in your belly button and pump you full of gas and then they make 2 or more smaller incisions above the pubic bone and they then locate the cyst and drain the fluid. Should the cyst be larger or more complex, they do an incision in the abdominal wall and remove it like that. I've only had laparoscopic drainages.
Many doctors will remove a cyst that is 5cms or larger as they can twist and cause pain and other issues. They might be able to perform this laproscopically.