hi!basically there is three types of skin cancer basal cell carcinoma, squamous cell carcinoma finally malignant melanoma which is the most dangerous one. people who are exposed to ultraviolet rays from sun for longer time, people who have family history similar skin cancer, white race, and people with age over 50 are more prone it. basal cell carcinoma and squamous cell carcinoma r usually found on head and neck, they have various morphology. where as melanoma is can be found in any part of body.
characteristic appearence of basal cell carcinoma is like ulcerated nodule with pearly beaded margin and dilated small vessels over it.where as basal cell carcinoma is more like thickened indurted verrucous plaque on sun exposed parts ,sometimes also seen as raised ulcer with indurated base, everted broad margin. malignant melanoma is has various different forms, ABCD rule of melanoma is usually very helpful to consider the diagnosis.
Any suspected lesion should be consulted with dermatologist and excisional biopsy should be sent for histopathological examination immediately. Diagnosis of all these skin caners can only be confirmed by histopathological examination.
surgical excision is treatment of choice for all types of skin cancers.