Clinical Research Directory

Inclusion Criteria: * Female participants must have histologically or cytologically confirmed invasive breast cancer. * Male participants must have biopsy proven breast cancer. * Age must be \>= 18 years, and all must be able to understand and willing to sign an informed consent document. Exclusion Criteria: * Dementia, altered mental status, or any psychiatric condition that would prohibit the understanding or rendering of informed consent; a history of serious or life-threatening allergic reaction to local anesthetics (i.e. lidocaine, xylocaine). * Any other condition, which in the opinion of the patient's treating oncologist, or the physician performing the biopsy procedure, would make participation in this protocol unreasonably hazardous for the patient.