Since your Mom has gone to UCSF, she has been to a major NCI designated CCC, but I would still suggest she get a second opinion from another large Cancer Center.
I don't believe there is another NCI designed CCC in the bay area, but I know in California we do have some excellent large Cancer Centers that are affiliated with NCI designated CCC's or CC's and may be worth consideration.
This is a link to another resource locater:
http://www.cancer.org/asp/search/ftc/ftc_global.asp