I was diagnosed with secondary breast cancer in December 2012' I had 18 weeks of chemo and from June 2013 have been taking letrozole I have seen my consultant today and he has said that me tumour marker has gone up, it has been 379, 400 and now is 420. Can anyone tell me if they have had this and what's does it mean. I had a scan as well and that is stable. Any replies grateful received