Getting a cancer check of skin with tattoo?

Rephrase question: If i can rephrase your question- you are asking how to check skin cancer if your skin is full with tattoo? The answer is-- it would be difficult. Your dermatologist really have to look very carefully to see if there is anything suspicious. You have to pay attention to your own body, if you feel a growth or something not right -bring that up to your doctor.And, dont add anymore tattoo, if you can.