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The ABCD Rule

If you notice any of the following signs, then see your doctor without delay.

  • Asymmetry – the two halves of your moles do not look the same
  • Border – the edges of your mole are irregular, blurred or jagged
  • Colour – the colour of your mole is uneven, with more than one shade
  • Diameter – your mole is wider than 6mm in diameter (the size of a pencil eraser)

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