This is an international, multicenter, prospective, non controlled, non randomized, clinical study to collect electrical impedance data of potentially malignant pigmented nevi and histological diagnoses (International Melanoma Algorithm Training Study [IMATS]). The study objective is to collect data for training and optimization of an algorithm that can classify skin lesions using electrical impedance, i.e., to identify malignant melanomas.

Inclusion Criteria:

• Men and women of any ethnic group
• Lesion located on normal healthy skin
• Maximum number of eight lesions per patient
• etc.

Exclusion Criteria:

• Lesion under finger and toe nails
• Lesion located on eczema, psoriasis areas or similar
• Lesion located on scars
• etc.