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The incidence of squamous cell carcinoma (SCC) and basal cell carcinoma (BCC) was analyzed separately in all 764 patients who received a renal allograft between 1966 and 1988 at the Leiden University Hospital. The mean follow-up period was 8.7 posttransplant years (range 1-21 years). During this time period 176 skin cancers were diagnosed in 47 patients. The overall risk to develop a first tumor increased from 10% after 10 years to 40% after 20 years of graft survival. The overall incidence of SCC was 250 times higher and that of BCC 10 times higher when compared with the general Dutch population. Moreover the localization of SCCs and BCCs differed considerably. Solar radiation is thought to be an important risk factor for the development of skin cancer. However, the occurrence of skin cancer in long-term graft survivors forms also a major problem in a country with a higher geographical latitude and a moderate amount of sun-exposure, such as the Netherlands.
Hartevelt et al. (Thu,) studied this question.