Photoacoustic Imaging in Diagnosing Changes in Tumors in Participants With Breast Cancer, Sarcoma, Skin Cancer, or Soft Tissue Malignancy and Healthy Volunteers

PRIMARY OBJECTIVES: I. To define the feasibility of the current photoacoustic imaging (PAI) technology in various groups of human subjects. SECONDARY OBJECTIVES: I. To define the utility of the current PAI on various groups of human subjects. II. When possible, via means of an existing data review, PAI will be correlated with standard imaging modalities performed on patients as routine part of clinical care or on protocol. III. When possible, via means of an existing data review, PAI will be compared to pathologic specimens. IV. When possible, via means of an existing data review, PAI data will be correlated with outcomes of patients to therapies they receive. OUTLINE: Participants undergo PAI on different parts of the body over 20 minutes for up to 5 imaging sessions for 6 months.