Sunlight is considered the major cause ,particularly in the early years of research.
Malignant Melanoma may occur in pre-existing moles and can have the fallowing signs:
- Less helpful sign:
-irregular colour
-elevation
-irregular border
- Minor signs:
-sensory change
-the diameter become more than 7 mm(unless growth is in the verticl plane)
- Major:
-change in shpe
-change in colour
If is smooth,well-demarcated and regular -is not a melanoma.
Squamous Cell Cancer:
This usually presents as an ulcerated lesion with hard,raised edges.They may begin in solar keratoses or be found on the lips of smokers or in long-standing gravitational leg ulcers.Metastases are rare,but local local distuction may be extensive.As treatment is required the total excision.
Basal Cell Carcinoma:
Typically ,pearly nodule with rolled telangiectatic edge usually on the face.If is untreatead become localy distructive epithelioma.Have as cause the UV exposure and can apper as red scaly plaques with raised smoot edges.
Avoid long and unprotected sun exposer!
Go for medical examination !