The purpose of this study is to determine whether afamelanotide (CUV1647) is effective in reducing the number of actinic keratoses and squamous cell carcinomas developing in immune compromised organ transplant recipients, who are at particularly high risk, over a 24 month test period.

The number of lesions formed on the head, hands and forarms will be monitored over this 24 month test period.

Inclusion Criteria:

• Organ transplant recipients with stable transplant function and who received their transplant at least 2 years prior to study entry
• Organ transplant patients who have had at least one biopsy-positive SCC
• Aged 18 - 75 years
• Written informed consent to the performance of all study-specific procedures

Exclusion Criteria:

• Allergy to afamelanotide (CUV1647) or the polymer contained in the implant
• History of melanoma
• Current pigmentary disorders such as melasma
• Diagnosed with HIV/AIDS, or hepatitis B or C
• Current history of drug or alcohol abuse (in the last 12 months)
• Clinically significant organ dysfunction, history of medical disorders or other factors, which in the opinion of the investigator will interfere with the interpretation of study outcome measures
• Major medical or psychiatric illness
• Pregnancy as confirmed by positive serum beta-HCG pregnancy test prior to baseline or lactating mothers
• Females of child bearing potential not using adequate contraceptive measures
• Participation in a clinical trial for an investigational agent within 30 days prior to the screening visit
• Use of regular medications or any other factors that may affect skin pigmentation

Discontinuation Criteria:

• Initiation of treatment with systemic retinoids
• Change of class of systemic immunosuppressant treatment