I just don't understand this. I have invasive ductal carcinoma. I was told that the mammy could not detect this because the tumor was so small less than 1 cm. A ultrasound confirmed this. Yesterday I was told MRI looked good, showed no more cancer than what we already new. Today I saw onc and she tell's me that MRI measured tumor to be 3 cm. I don't get it, why if this is true that it could not be seen before. I was told I have had this cancer for about a year now. Had mammy last year to, nothing was found. What is the facts with this. Do I just wait for the news after I am cut or what. I guess what really has me upset is that if the nodes were not involved and the tumor was in fact 1 cm that I would not have to go though chemo. Now I am told that with a 3cm tumor chemo is needed. I was really let down today. I was so hoping this was going to be small and that I had a better chance. Is this what I have to look forward to, never really knowing the facts. I do have good doctors, but I am scared again. I thought I had all the facts except the nodes. I feel really let down, I not sure thats the right words. I just don't know what to think. I went from stage 1 to 2 now and maybe by the time I am out of surgery stage 3. Now what ??