Incidence of skin cancer has been increasing over the decades and early treatment is becoming more and more important. The five year survival rate of melanoma, the most fatal skin cancer is only 9–15% at stage IV, while this rate increases to 85–99% if detected early at stage II. Basal cell carcinoma (BCC), the most common skin cancer is rarely fatal, but it destroys surrounding tissue if left untreated.
Fig: Four regions in the skin lesion image.
In this paper, we focus on the first issue, i.e., the limitation of applicable skin lesion types. That is, most of the conventional works handled only melanocytic skin lesions (MSLs) such as melanomas and nevi, which originate from melanocytes, whereas nonmelanocytic skin lesions, (NoMSLs) indicating all the other pigmented skin lesions except MSLs such as BCCs and seborrheic keratoses (SKs) have been relatively neglected.
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