Liquid Nitrogen & Cortisone Injection

I had my mucocele diagnosed today by a dermatologist in Sydney.

He gave it 2 blasts of Liquid Nitrogen, which has swelled the thing a fair bit (1 hour later). He suggests if that doesnt work then he will give me a cortisone injection..failing that he tells me its surgery.

Just wondering if anyone had any previous success or experiences with either the nitrogen or the injection. The latter thing concerns me and being honest I didnt warm to the guy much - think im gonna get another opinion.

I'd rather just stump up the cash, have the op and get rid of it then messing about and maybe doing more harm!