When to Worry About a Mole
You should urgently refer a mole to a dermatologist if it is changing in size, shape, or color; has three or more colors or lost symmetry; is itching or bleeding; or is a new mole appearing after puberty that is evolving. 1
Specific Red Flags Requiring Urgent Specialist Referral
The British Association of Dermatologists provides clear criteria for when immediate concern is warranted 1:
- Any new mole appearing after puberty that is changing in shape, color, or size 1
- A long-standing mole that is changing in shape, color, or size 1
- Any mole with three or more colors or has lost its symmetry 1
- A mole that is itching or bleeding 1
- Any new persistent skin lesion that is growing, especially if pigmented or vascular in appearance 1
- A new pigmented line in a nail, especially with associated nail damage 1
- A lesion growing under a nail 1
Clinical Assessment Features (ABCDE Criteria)
When evaluating concerning moles, look for 1:
- Asymmetry - one half doesn't match the other 1
- Border irregularity - edges are ragged, notched, or blurred 1
- Color variability - multiple colors or uneven distribution 1
- Diameter greater than 6 mm - though melanomas can be smaller 1
- Evolution - any change in size, shape, color, elevation, or new symptoms like bleeding or itching 1
High-Risk Populations Requiring Heightened Vigilance
Certain individuals warrant more aggressive monitoring 1:
- Fair-skinned individuals older than 65 years 1
- Patients with atypical moles (dysplastic nevi) 1, 2
- Those with more than 50 moles 1
- Previous history of melanoma 1
- Family history of melanoma, especially with 2+ first-degree relatives 1
- Organ transplant recipients (8-10 times increased risk) 1
- Giant congenital pigmented nevi (>10 times increased risk) 1
Critical Practice Points
Do not remove suspicious moles in primary care. 1 Clinicopathological correlation is vital for diagnostic accuracy, which determines prognosis and treatment options, and diagnostic surgery requires specialist training 1. Early recognition and proper specialist referral provide the best opportunity for cure 1.
Documentation Requirements
When evaluating a concerning mole, document 1:
History:
- Duration of the lesion 1
- Change in size 1
- Change in color 1
- Change in shape 1
- Symptoms (itching, bleeding) 1
Examination:
- Site 1
- Size (maximum diameter) 1
- Elevation (flat, palpable, nodular) 1
- Description (irregular margins, irregular pigmentation, ulceration if present) 1
Risk Context
A changing mole in an adult is particularly concerning and often indicative of melanoma development 1. However, the absolute risk of any single mole transforming into melanoma is relatively low - approximately 0.0005% annually for those under 40 years, increasing to 0.003% for men over 60 years 3. Despite this low individual mole risk, the presence of multiple atypical moles substantially increases overall melanoma risk 4, with those having 25 or more benign moles showing a 4.33-fold increased risk compared to those with 0-4 moles 4.