prognosis question

[4mom]

My mom who is 56 just finished chemo for stage IIc clear cell ovarian cancer. She had her first CT scan and everything was clear. She was diagnosed in October 2006. Her Gynocologist oncologist suggested going for CT scans every 4 months and getting a CA-125 test every 3 weeks. He does not like the CA-125 test for my mom as it was only 11 before surgery and now at 8- he said due to clear cell, and not being accurrate...? She also went for a second opinion at Johns Hopkins and the Doctor there agreed with what she should do moving forward. I have a few questions---Is there anything else we can do after first line chemo- antibodies, more chemo to ensure less chance of recurrence? Also, her pathology report stated that the tumor was in just one ovary( right side ) and it was stage II because it was touching her pelvic side wall. They removed 12 lymph nodes and all were negative. Nothing in her uterus or fallopian tubes- I am confused on the differences between stage Ic and IIc as they seem similar. Both Doctors said she could be considered a Ic as the tumor was barely ruptured during surgery. The statistics are much more favorable for stage Ic- is their a big difference? My last question- is it better that the ovary ruptured during surgery than happenin before? With her findings- stage IIc,clear cell, grade 3, 56 years old- clean CT scan- does she have a favorable prognosis?
Thanks for your time and input- it is very much appreciated.
A worried son