The purpose of this study is to find out whether the Nevisense device can provide useful information about atypical moles to complement the usual assessments done during routine screening for melanoma. Assessing particpants' moles with the Nevisense device may help improve screening methods for the early detection of melanoma in people with atypical mole syndrome.

Inclusion Criteria:

• Adult patients (> 30 years of age) at the time of the initial study visit.
• Patients displaying a phenotype that consists of ≥ 100 nevi on the entire cutaneous surface and at least three large acquired nevi (LAN) > 5 mm in diameter. These patients have "atypical mole syndrome", which is a high-risk nevus phenotype and the target patient population in this study.
• Patients with at least three clinically stable nevi between 5 and 20 mm in diameter.
• Patients (or LAR) who are able to provide informed consent.
• Patients with previous total body photography images taken at least 3 years prior

Exclusion Criteria:

• Patients without at least three clinically stable nevi between 5 and 20 mm in diameter.
• Patients with any electronic implantable devices.
• Patients who are pregnant (verbally confirmed with the participant).

Potential research subjects will be identified by a member of the patient's treatment team, the protocol investigator, or research team at Memorial Sloan Kettering Cancer Center (MSKCC). If the investigator is a member of the treatment team, s/he will screen their patient's medical records for suitable research study participants and discuss the study and their potential for enrolling in the research study. Potential subjects contacted by their treating physician will be referred to the investigator/research staff of the study.

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.