"Axillary dissection versus no axillary dissection in patients with sentinel-node micrometastases (IBCSG 23—01): a phase 3 randomised controlled trial"  
Lancet April 2013
http://www.lancet.com/journals/lanonc/article/PIIS1470-2045(13)70035-4/fulltext 
"Interpretation

Axillary dissection could be avoided in patients with early breast cancer and limited sentinel-node involvement, thus eliminating complications of axillary surgery with no adverse effect on survival.  

Funding

None."