I have heard about Cryosurgery when I was looking into non surgical treatment options in 2009, but haven't heard much about it since or know of anyone who did this treatment or where it's offered in a CCC. There was a video on-line of a guy who had it done for head and neck cancer. I know heat, as opposed to the cold (Cryosurgery), is used to sensitize tumors before radiation in some cases.
Cryotherapy is used used to help with mucocitis, hair loss, neuropathy with some chemo's like taxotere, 5-FU.
That's about all I know. Good luck.