So I saw my surgeon yesterday...He told me that my thymoma is 5cm

...The size of a golfball...He said that it's not horrible but not very small either....He said that I can have the surgery where they slice down the centre of the chest or the one where they slice just underneath the breasts to get it out....
Has anyone had the slice underneath the breasts? He said that it's a bit more painful...I wasn't too concerned with the scar before as I figured I had no choices, but now I'm wondering whether maybe going with this type of incision is better (scar-wise).
Anyone have a similar 'slice'?
P.S. Sorry for the use of the word 'slice.' :S lol
Nicky