Melanoma or something else 14yr old daughter

Hi, I noticed a few months ago that my daughter had bruise like Mark's on both big toes 

As she is diagnosed with JIA ( form of arthritis) we thought it might be connected but her consultant said it wasnt and to just keep am eye on it. 

Now the Mark's have grown in size and after googling this it has lead me to Melanoma 

Could someone please say whether they think this is possible 

Thanks in advance 

Worried mum xx

 

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