Participants in this study will have Multispectral Optoacoustic Tomography/MSOT imaging of both breasts immediately before their ultrasound-guided breast biopsy procedure begins. After the MSO imaging is completed, participation in the study will end.

Inclusion Criteria:

• Participant is a female or male who is 18 years of age or older.

• Participant must meet one of the following:

  • Suspicious breast imaging finding detected on either mammography, ultrasound, or MRI that is visible on ultrasound and therefore recommended for ultrasound-guided breast biopsy (BI-RADS 4 suspicious abnormality; BI-RADS 5, highly suggestive for malignancy)
  • No previous treatment for breast cancer
  • Diagnosis of melanoma

Exclusion Criteria:

• Life expectancy < 3 months

Participants with a suspicious breast imaging finding detected on either mammography, ultrasound or MRI that is visible on ultrasound and therefore recommended for ultrasound-guided breast biopsy (BI-RADS 4 suspicious abnormality; BI-RADS 5, highly suggestive for malignancy) who are scheduled for ultrasound-guided breast biopsy by the Memorial Sloan Kettering Department of Radiology Breast Imaging Service will be included.

Memorial Sloan Kettering Cancer Center supports the international committee of medical journal editors (ICMJE) and the ethical obligation of responsible sharing of data from clinical trials. The protocol summary, a statistical summary, and informed consent form will be made available on clinicaltrials.gov when required as a condition of Federal awards, other agreements supporting the research and/or as otherwise required. Requests for deidentified individual participant data can be made beginning 12 months after publication and for up to 36 months post publication. Deidentified individual participant data reported in the manuscript will be shared under the terms of a Data Use Agreement and may only be used for approved proposals. Requests may be made to: crdatashare@mskcc.org.