Mole mapping at Guildford Hospital

Almost everyone has moles and some people have quite a lot. It can therefore sometimes be difficult to know whether a mole has changed or whether a mark on your skin is new. This is a particular problem for skin sites that are hard to keep an eye on, for instance your back.

We therefore provide a state of the art computer-assisted mole mapping and digital photo-dermoscopy surveillance service. This is particularly useful for people who are known to have an increased risk of the development of malignant melanoma.

Who should consider having their moles mapped?

People who are at increased risk of the development of skin cancer. This includes those with:

• Large number of moles
• Moles that have an unusual appearance (atypical moles)
• A family history of skin cancer
• A personal history of skin cancer
• Pale skin that easily burns in the sun
• Episodes of previous severe sun burn
• Exposure to significant amounts of sunlight like working or living abroad or outdoor work
• A suppressed immune system

What does it involve?

• A specialist nurse will record your medical history to identify any risk factors for skin cancer
• Standardised whole body digital photographs are taken and stored on our secure computer
• Your skin is examined by a consultant dermatologist to identify any suspicious lesions
• Unusual appearing but harmless moles are photographed using a close-up technique called digital photo-dermoscopy
• You will immediately be advised if any of your moles have the features of melanoma
• In most cases, no melanoma will be found. Under these circumstances, we will usually offer to repeat the screening in 6 to 12 months, or sooner if you notice any changes in the meantime. At these follow-up screenings, your previously stored photographs are used as a baseline to detect any new or changing lesions.

What are the advantages?

• Malignant melanoma can be detected at an early stage when treatment is most effective
• Your skin will be examined for malignant melanoma by a specialist consultant dermatologist
• One-stop screening and surgical removal is offered for those with malignant melanoma
• Your whole body photographs and digital photo-dermoscopy images are retained for future comparisons
• Unnecessary removal of harmless moles can be prevented