Melanoma, while rare, is one of the most dangerous types of skin cancer accounting for four out of five deaths from the disease. Charities warn a record 20,000 Brits could get this cancer this year.Melanoma, while rare, is one of the most dangerous types of skin cancer accounting for four out of five deaths from the disease. Charities warn a record 20,000 Brits could get this cancer this year.Read MoreHealth News | Mail Online