Have had 2 prior CEA tests - 122, 125. Dr. called and left unclear message re latest test.The new number sounded like it was was l50. Can't reach Dr, on weekend. Very worried rhat cancr has spread if that number is correcct. Have been taking Tarceva for 90 days and if 150 is right, Tarceva is not working. Help from anyone would be appreciated as I know I will be worried all weekend.