Snapshot AK close up A 60-year-old man with multiple "sun spots," or solar lentigos, comes to the dermatologist for his annual skin exam. He complains of several rough patches on his cheeks that has been there for a year. They feel like sandpaper. He is a gardener and often spent hours under the sun. Introduction Keratotic, pre-malignant lesions Epidemiology login to view 4 more bullets May lead to squamous cell carcinoma Presentation Symptoms login to view 1 more bullet Physical exam login to view 5 more bullets Evaluation Skin biopsy login to view 2 more bullets Differential Squamous cell carcinoma Actinic cheilitis Lentigo maligna Photoaging login to view 2 more bullets Treatment Lifestyle modification login to view 2 more bullets Surgical login to view 1 more bullet Pharmacological login to view 1 more bullet Prognosis, Prevention, and Complications Prognosis login to view 1 more bullet Prevention login to view 2 more bullets Complications login to view 1 more bullet