Abstract
Xeroderma pigmentosum (XP) is a genodermatosis characterized by marked photosensitivity, dyschromia and high risk of skin cancer. From a clinical point of view, the diagnosis of melanoma in XP patients can be very difficult, because they have many lentigines and melanoses. Also, on histology, differentiating cases of non-malignant melanocytic proliferation from melanoma can be an arduous …