Try not to panic Jess. This is what I understand. Because these lymph nodes are so tiny in our bodies and do not follow a particular pattern finding the sentinal is easyer in some than other patients. If they can get that one apparently it is best, then they look for ones around it (in fatty tissue) and check the nodes for cancer traces ( at the lab). No 1 is not as dangerous cancer No 2 is dicy No3 is more serious. As the nodes clean the blood, if there is a trace of cancer in them they will take more breast, hence second opp. Chemo gets the blood cleared and Radio Therapy makes sure that the cancer is not left around the wound. These guys do have a hard time finding these things. I can't wait till they come up with an injection to combat the cancer without surgery, they are working on it. In the meantime we are in their hands. Ask everyone you can at the hospital Surgeon, Oncologist what it all means. At least these days like me there are many survivors. All the best Chrisy