My mom was diagnosed with Primary Peritoneal Carcinoma last march. I am having a very difficult time finding information on this type of cancer. Her doctor tells us it behaves and is treated the same as ovarian cancer. She is getting ready to have her 6th chemotherapy treatment and I am worried because her ca-125 was originally 2938 and after she had surgery and 5 chemo treatments her ca-125 was down to 91 and all of a sudden it is now up to 111. Does anyone have any information on my mom’s cancer or what this ca-125 going up may mean? Deb H., MN