DERM is a Medical Device that uses artificial intelligence to help doctors check if a skin lesion might be cancerous. It works by analysing close-up pictures of skin lesions taken with a smartphone.

This study aims to demonstrate how consistent (precise) the output of DERM is: i.e. does it provide the same result when it analyses multiple photos of the same lesion (repeatability), and when the same lesion is photographed by different people, or with different cameras (reproducibility).

Adults with at least one skin lesion that doctors are checking for cancer, as part of their standard care, will be able to take part. Suitable lesions will be photographed three times, each by three different people using three sets of image capture hardware (specifically, an iPhone 11 with a DL200/HR dermoscopic lens). Each image will be checked for good image quality as it is captured. Images will then be transferred to DERM, where they'll be analysed.

The DERM output won't be shared with the patients or doctors involved in the study. The patients will continue to have their skin lesion biopsy/excised, in accordance with standard of care. Their diagnosis will be collected and compared to the output from DERM.

Inclusion Criteria:

• Male or Female,
• aged 18 years or above,
• Willing and able to give informed consent for participation in the study,
• Has at least one skin lesion that, following assessment by a primary care provider and a dermatology specialist, will be biopsied due to a high suspicion of skin cancer, and is suitable for assessment by DERM.
• In the Investigator's opinion, able and willing to comply with all study requirements.

Exclusion Criteria:

• Patients with more than one skin lesion due for biopsy
• Any other significant disease or disorder which, in the opinion of the Investigator, may either put the participant at risk because of participation in the study, or may influence the result of the study, or the participant's ability to participate in the study.

To be suitable for inclusion, a skin lesion must NOT have ANY of the following limitations:

• Be located on an anatomical site of different skin structure: palms of hands or soles of feet (acral lesion), mucosal surfaces (lips and eyes) or under nail (ungal lesion),
• Have a diameter greater than the diameter of the dermoscopic lens,
• Be located on an anatomical site unsuitable for photographing, including on surface of genitals and hair-bearing areas,
• Have been previously biopsied, excised, treated or is otherwise traumatised
• Be located in an area of visible scarring or tattooing.

Patients will be recruited in specialist dermatology clinics in the UK.

Subject to constraints in patient consent