80% of skin cancers are<unk>  cell, 16% are squamous cell, and 4% are melanomas
5% to 10% of<unk> s are aggressive, invade and destroy skin and surrounding tissues, sometimes reaching bone
Rarely a metastatic process
UV radiation
Chronic arsenic exposure
Ionizing radiation
Immunosuppression
Age and skin colour (light tone)
Also known of a certain genetic predisposition (higher in people from the northern hemisphere)
Basal cell carcinoma
Acute generalized exanthematous pustulosis
Seborrheic keratosis
Allergic reaction
Squamous cell carcinoma
Aphthous stomatitis
Melanoma
Atopic dermatitis