Derm Dx: Extensive sun exposure and red lesions on the arms and legs

A 65-year-old white man presents with red lesions on his arms and legs. The lesions are asymptomatic and have increased in number over the past 2 years. He admits to ample sun exposure since early childhood and now regularly uses sunscreen. He has no prior history of skin cancer. On examination, multiple erythematous patches and thin plaques of varying sizes ...