. >> 43-year-old susanne hoffmann regularly visits her dermatologist to have her moles looked at. over the years, she's had a few removed. seven years ago, she had her first cancer scare. >> i found something that looked suspicious. it didn't look like a normal liver spot. so i went to my dermatologist and had him examine it. it turned out to be non-melanoma skin cancer. >> non-melanoma skin cancer is usally caused by too much exposure to the sun. it tends to form on the surface of the skin, around the nose, the lips or the forehead. >> i do love the sun and i always did. in the past we weren't aware of the risks of sunbathing. when we were younger we'd go to the outdoor swimming pool and we'd never apply sunscreen. >> dermatologist christiane bayerl sees a lot of patients with various types of non-melanoma skin cancer. >> basal cell carcinoma appears as a red patch with dilated blood vessels and often a raised bump. it might bleed. squamous cell carcinoma appears as an ulcerated lesion. >> the tumour that susanne hoffmann discovered was a basal cell carcinoma. it was surgically r