One of the deadliest cancers out there is this type of skin cancer caused by melanocytes is melanoma. They can either be new growths on the skin or it can be an existing mole could turn into this cancer. The catch with this cancer is that if it is caught in the early stages, it can be surgically removed and the survival rate is extremely high. But, if it spreads to other regions of the bodies, it is a very low survival rate, and there is a good chance of death for the victim. The reason why this occurs is because there can literally be no symptoms the whole way through.
In terms of genetics, this cancer can happen with no family history, or it could happen with family history, also known as familial malignant melanoma. When it is passed down from generation to generation in a family, it is inherited in an autosomal dominant pattern, which means one copy in the copied gene has a higher chance of producing melanoma on the body of the victim. Although getting melanoma via inheritance of a generation does happen, about 90% of melanoma cases are random.
It is always good to get regular body examinations. Doing this enables doctors to see if any warts on the body has changed to cancer, or if there are any new growths growing. It is better to be safe than sorry when curious if a growth on the body is cancer or not, because there are other skin cancers, such as basal cell carcinoma and squamous cell carcinoma.