The 4 Stages of Cancer

The details vary between tumors, but in general:

Stage 1 means localized
Stage 2 means invasion into nearby tissues
Stage 3 means spread to local lymph nodes
Stage 4 means distant metastases. 

There is no such thing as a false positive test.  There is positive and there is negative and then there is take the test over to confirm the results.

If any doctor or nurse tells you that they can't find your veins let them know that if you are breathing you have working veins and they should keep looking.