Inclusion criteria  1. Patients with one or more premalignant lesion or KC diagnosed by a dermatologist or by histopathology untill 10 years previous to inclusion.  Exclusion criteria  Patient is younger than 18 years old or unable to provide consent. Patient is unable to remember the diagnosis or symptoms of their KC or premalignant lesion upon request by the doctor. Patient was diagnosed with a melanoma or another NMSC. Patient is unable to understand the task and questionnaires.