Fast Spectral Imaging Device for Tumor Margin Mapping

Inclusion Criteria: * Patients undergoing a partial mastectomy or mastectomy for the treatment of an invasive or non-invasive breast malignancy * Age \> 18 * Clinically detectable disease either by physical examination or radiographic studies * Patients of all ethnic and gender groups will be included. Protocol accrual will be reviewed annually to include a determination of minority and gender representation. If accrual demonstrates under representation of any group with comparison to disease incidence in that group, appropriate measures will be undertaken to increase participation of patients of that minority or gender group. * Ability to understand and the willingness to sign a written informed consent document Exclusion Criteria: * Patients considered in "vulnerable" populations