Treatment of early skin cancer will depend on the type of skin cancer you have. Early melanoma is treated easily, with a simple excision of the primary lesion, as well as surrounding tissue. When you think about treating late melanoma which may require extensive surgery, radiation therapy and chemotherapy, that's why it is so important to see a dermatologist for a suspicious lesion, to catch the melanoma early on without its being invaded into the dermis.
Similarly, with squamous cell carcinoma, treatment of squamous cell carcinoma in situ is significantly easier, than treating invasive squamous cell. In fact, squamous cell carcinoma in situ can be treated with just topical chemotherapy medicines like Aldara and Efudex. Even though excision is still the primary preferred method of treatment, for elderly patients, or for lesions in a cosmetically sensitive area, using these cancer creams can be an acceptable way of treating early squamous cell carcinomas.