Photoacoustic Imaging (PAI) of Suspicious Breast Cancers - A Clinical Feasibility Study

Inclusion Criteria: * Patients must have a breast lesion/mass found at physical examination, mammography or ultrasound (US), that has not been surgically resected * Patients may have any of the following characteristics: * Taking hormones (e.g., contraceptives, hormone replacement therapy, post-cancer Tamoxifen) * Breast implants * Previous breast biopsy * Previous breast surgery * Previous breast cancer * High risk of breast cancer (e.g., breast cancer susceptibility gene (BRCA) mutations, other gynecologic cancer) * Ability to understand and the willingness to sign a written informed consent document Exclusion Criteria: * Patients who have had primary surgical excision of the suspicious finding * Pregnant or lactating women