I'm going to post the results of my Bayer Serum Tests here, will update with each test.
Oncogene Science HER-2/neu Microtiter ELISA (Reference: 5.1-13.5 = normal range
03/28/06 - 12.7
04/25/06 - 11.5
05/24/06 - 6.8
Am currently on 2 weekly Herceptin with continuous low-dose Xeloda. Have been on Herceptin/+or- chemo since 2001 for systemic disease in lymph system. Initial tumor marker analysis was with CEA, but levels were no longer elevated at third recurrence in Oct.2005. First HER-2/neu Serum test was performed (and Navelbine stopped) one month after starting Xeloda.