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Aims arid background: In recent years several radiation therapy units have recorded a decline in the number of referrals for the treatment of skin carcinomas. This study aims to ascertain whether this decline has also affected the radiation therapy unit of Trieste and, if so, to consider the possible reasons.

Methods: We retrospectively reviewed all cases of non-melanoma skin cancer treated in our unit from January 1986 to December 1999. A database was created that would allow rapid and controlled data entry and a sufficiently simple query system.

Results: The total number of irradiated skin cancers was 2219: 1863 basal cell carcinomas, 276 squamous cell carcinomas, and 80 basosquamous carcinomas. The distribution curves for the number of cases treated every year were similar: each of the three types showed a slow and gradual reduction in the number of patients referred for radiotherapy.

Conclusions: For most authors surgery remains the treatment of choice for skin carcinomas. However, radiation therapy can also yield excellent results in terms of local control, cosmesis and functionality. In our view the indications for radiation therapy are poor general health, elderly age, the presence of diseases that are a contraindication for surgery, location of the tumor in the head region, and tumor size between 1 and 5 cm.