Hello, I've recently been diagnosed with a melanoma in the form of a lump on my leg. Medical team say it's come from a mole on my knee removed four years ago and which at the time I was told was benign. I had a PET scan this week and it's been recommended I have an urgent MRI on my liver. I've had so many blows lately that I've resigned myself to thinking the cancer will be there too. Could it be anything else?