What happens when all lymph nodes are removed from left chest area?

After a left breast lumpectomy and ten lymph node removals, then a follow-up surgery for clear margins last year, I have recently been diagnosed with the same cancer. Although only two lymph nodes tested positive, eight were removed "as procedure". This time it is tumors on the lymph node incision. Now, the surgeon says he will remove the tumors, remainder of my breast, and all the lymph nodes... "as procedure", although none of the lymph nodes shows cancer. He warned me I will face lymphedema. Has anyone had all lymph nodes removed in left chest cavity arm pit?