Skin Cancer

Melanoma | Skin Cancer Treatment | San Francisco CASkin cancer is the most common form of cancer in the United States and is the result of the abnormal growth of skin cells that can form anywhere on the body, but most frequently appear on skin that is exposed to the sun. There are more than a million new cases of skin cancer in the United States each year. Although most cases of skin cancer can be successfully treated, it is important to follow safe skin care recommendations to prevent this disease.

Dr. Evans is fellowship-trained in the most effective and advanced treatment for skin cancer today, Mohs Surgery.

Causes of Skin Cancer

Everyday, skin cells die and new ones form to replace them in a process controlled by DNA. Skin cancer can form when this process does not work properly because of damage to DNA. New cells may form when they are not needed or older cells may not die. This can cause a growth of tissue known as a tumor. DNA damage is often a result of ultraviolet radiation from sunlight or tanning lamps. In some cases, skin cancer can affect areas of the skin that have not been exposed to the sun. Certain factors, such as fair skin, moles, a weakened immune system, heredity, and age, can also increase the risk of skin cancer.

Types of Skin Cancer

There are three major types of skin cancer that affect different layers of the skin. The types of skin cancer are named for the different types of skin cells that become cancerous.

Basal Cell Carcinoma

Basal cell skin cancer occurs in the basal cell layer of the skin and is the most common type of skin cancer. It commonly occurs on areas of the skin that have been exposed to the sun, such as the face. It rarely spreads to other parts of the body.

Squamous Cell Carcinoma

Squamous cell carcinoma occurs in the squamous cells and it is a very common type of skin cancer. Squamous cell carcinoma commonly occurs in sun exposed skin but it can also occur in skin that has not been exposed to the sun. Squamous cell carcinoma is often found on the face, head, ears and neck. Squamous cell skin cancer may spread to other parts of the body.


Melanoma is the most aggressive type of cancer and is more likely than other skin cancers to spread to other parts of the body. Melanoma occurs in the melanocyte (pigment) cells within the skin and can form on any part of the body, regardless of past sun exposure.

Skin Cancer SYMPTOMS

Skin cancer is often identified as a new or changed growth on the skin that may occur on the scalp, face, lips, ears, neck, chest, arms, hands or legs. Although these are common areas for skin cancer growths to form, they may occur on any part of the body and may have the following characteristics:

  • New or non-healing pearly or waxy bump
  • Flesh-colored or brown scar-like lesion
  • Firm, red nodule
  • Crusted, flat lesion
  • Large brown spot with darker speckles
  • Mole that changes shape or color
  • Shiny, firm bumps


To diagnose skin cancer, Dr. Evans will review all symptoms and check the skin for any unusual growths or abnormal skin patches. If skin cancer is suspected, a biopsy will performed on the growth or area of skin in question. Once the results of the biopsy are reviewed, the type of cancer will be determined and a treatment plan will be created. Individuals who experience any skin changes or changes to existing moles or birthmarks, should promptly see Dr. Evans as early detection is valuable in successfully treating skin cancer.

Treatment for Skin Cancer

Treatment for skin cancer depends on the type, size and location of the tumor. Most options include the removal of the entire growth and are an effective form of treatment. Removal procedures are usually simple and require only a local anesthetic in an outpatient setting. Some of the treatment options for skin cancer may include:

Skin Cancer Treatment | Melanoma Treatment | San Francisco CA

  • Mohs Surgery
  • Surgical Excision
  • Laser therapy
  • Medical Treatments

Depending on the stage and severity of the skin cancer, in addition to the removal of the growth, chemotherapy and radiation may be recommended.

Prevention of Skin Cancer

Although not all cases of skin cancer can be prevented, the best protection from skin cancer is protection from the sun. The following recommendations may help in preventing skin cancer:

  • Limit exposure to the skin, especially between the hours of 10 a.m. and 4 p.m.
  • Always wear broad spectrum sun screen with an SPF of at least 30
  • Wear a hat in the sun
  • Wear long sleeves and long pants
  • Avoid tanning beds and salons

Individuals are advised to practice preventive measures and see Dr. Evans for a full body screening on a regular basis.

If you would like more information about Skin Cancer or to schedule an appointment, feel free to fill out our convenient contact form or call us directly at SF: (415) 202-1540 or CM: (415) 924-2055.