- Definition
- Mole with unusual features
- Size > 5 mm diameter
- Ill-defined or blurred borders
- Irregular margin resulting in an unusual shape
- Varying shades of colour (mostly pink, tan, brown, black)
- Flat and bumpy components.
- Mole with unusual features
- Cause
- Sporadic
- Familial
- Can be part of Familial Atypical Mole and Melanoma Syndrome
- Dysplastic naevus
- Best used for a naevus with a specific microscopic appearance
- Many histologically dysplastic naevi are clinically banale (eg, small in size, and uniform in colour and in structure)
- Histological dysplasia may be mild, moderate or severe
- Importance of atypical naevi
- if >5 then increased risk of melanoma
- Treatment
- Do not need removal
- Remove if unclear if melanoma
