Anxious about my dermatology appointment

Today I am off to see a specialist about the mole on top of my hand. I suffer from neurofibromatosis and when my doctor saw it she said I need to refer you immediately and that was just over a week ago which is quite good that they have acted very quickly on what they think maybe skin cancer. With my condition my lumps can become cancerous and if it is then I am not sure , what they will do as this has not ever happened to me. I am worried as I really thought it was nothing.  Does anyone have any advice on will happen on my  first appointment . Thanks