The specific aims of this proposal are as follows: (1) to quantitatively assess insulin sensitivity in late breast cancer survivors, equally divided among subjects who display clinical evidence of ipsilateral arm edema and those that do not; (2) to correlate the presence of relative insulin resistance to the expression of breast cancer-associated lymphedema. It is hypothesized that such an approach has the capability to lead to future elaboration of appropriate risk stratification and targeted therapeutic interventions; (3) as a pilot investigation, to sequence the FOXC2 gene, including the untranslated 5' region, in each these patients, to identify potential polymorphisms that might correlate both to the presence of insulin resistance and lymphedema risk.