Mole Mapping

Mole mapping is a technique whereby a person's moles (naevi) are catalogued or mapped. The images created can then be used as part of a person's skin cancer surveillance program. There are two main types of mole mapping; conventional photographic imaging and digital dermoscopic imaging.

Conventional Photographic imaging

A series of standardised photographic images of body regions are taken to generate a complete map of the person's skin.

It is recommended, for accuracy and standardisation, that the images are taken by qualified medical photographers. The images can be printed on photographic paper, or stored on a computer or a CD-ROM.

Advantages

• The images are relatively quick to take
• Self-surveillance can be done at home
• They are portable and easy to store and to view
• New moles can be easily detected
• They can easily be re-printed if damaged or misplaced

Disadvantages

• Can be difficult to detect a change in a mole
• Not as detailed as dermoscopic imaging
• A partner is required to examine moles on the back

Dermoscopic imaging
Dermoscopic images allow a more detailed image of the mole to be recorded and stored. The digital devices standardise images for magnification and illumination and can record accurately the location of the moles.

Advantages

• The most detailed image of a mole is recorded
• Changes in the mole can be seen before they are visible with the naked eye
• Earlier detection of melanoma may be possible
• Computer software can help to detect new or changing naevi

Disadvantages

• It takes time and you need to visit your specialist
• The digital systems are expensive and bulky
• Follow up with the same digital system is required
• What type of 'mole mapping' is best?

Both types have pros and cons and sometimes a combination of the two is recommended.

How frequent should I check my moles?
There is no consensus opinion about the recommended frequency for self-surveillance of your moles. In general, for high-risk individuals self-surveillance should be undertaken at least 3-monthly or preferably monthly. There is no advantage to more frequent routine self-surveillance. For people with few risk factors for melanoma a less frequent program of self-surveillance could be adopted.

 

Most digital dermoscopic systems have integrated computer software, which can give a risk analysis of how suspicious a

mole is. However, independent published research has repeatedly shown limitations in the diagnostic ability of these systems. Therefore these systems should only be used for cataloguing moles and should not be used for diagnosis. The interpretation of any changes seen should only be performed by your specialist.

At North West Medical we offer the services of an NHS accredited specialists with a specific expertise in skin cancer that will use the mole mapping as an adjunct to your care, in combination with their clinical expertise. This is not the case in many mole-mapping clinics. This is essential to get the best management of your skin.