It is difficult to give any advice regarding prevention, but sunlight is a potential carcinogen for nonpigmented skin. Exposure to sun of the ear tips and non-pigmented eyelids or nictitans mucosa may be significant factors. | It is difficult to give any advice regarding prevention, but sunlight is a potential carcinogen for nonpigmented skin. Exposure to sun of the ear tips and non-pigmented eyelids or nictitans mucosa may be significant factors. |