Snapshot A 46-year old woman presents to her primary care physician for a dark spot on the back of her right hand. She states that the spot first appeared about 2 years ago and has slowly been growing. It does not burn, itch, or sting. She has a history of regular suntanning and minimal sunscreen use. On exam, there is a 2-cm, asymmetric, thin, brownish-blue plaque with somewhat ill-defined borders and an irregular pattern of coloration. Introduction Overview login to view 17 more bullets Epidemiology login to view 8 more bullets Pathophysiology login to view 8 more bullets Prognosis login to view 5 more bullets Presentation Physical exam login to view 7 more bullets Studies Serum labs login to view 1 more bullet Invasive studies login to view 13 more bullets Differential Actinic keratosis login to view 3 more bullets Basal cell carcinoma login to view 4 more bullets Treatment Medical login to view 5 more bullets Surgical login to view 3 more bullets Complications Metastatic melanoma login to view 5 more bullets