A 68-year-old patient with a long history of outdoor recreat…
A 68-year-old patient with a long history of outdoor recreational activity presents for an annual skin screening. During the examination, the APRN identifies a persistent, 1.2 cm, scaly, erythematous patch on the patient’s superior pinna that has failed to resolve over several months. Based on this clinical presentation, the APRN suspects this lesion is a warning sign of: