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Moles

Health and Nutrition > Diseases > M

  Moles  © NetDoctor/Geir
Moles (Contd)

Written by Prof James Ferguson, consultant dermatologist

Other types of moles include dysplastic, blue and halo naevi.
Dysplastic naevus syndrome Some large moles have an irregular outline and an indistinct border. These carry an increased risk of malignancy and tend to occur in families who have a history of malignant melanoma. Patients with such moles need to have them examined regularly and compared with clinical photographs.

Halo naevi
Occasionally the skin surrounding a small mole becomes lighter and the central mole becomes pale. Most halo naevi are benign. But some people may have an increased risk of developing the skin disorder, vitiligo. Patients with malignant melanoma may, very rarely, develop halo naevi.

Blue naevus
This deep-seated mole appears blue. It is very common in some West Indian infants but is only rarely of any significance.

Juvenile melanoma (Spitz naevus)
In this condition, the pigment cells form a benign tumour, which is usually a pink-brown colour. Although similar to melanoma, the outlook following treatment is good.

Common misconceptions
It is not true that moles on the soles of the feet or hairy moles are more likely to become malignant (cancerous).



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