title: Flat, asymmetrical pigmented patch on back: patient reports substantial sun exposure.
authors.affiliation: University of Arizona Health Sciences Center, Tucson, AZ, USA.
authors.forename: Norman
authors.initials: N
authors.lastname: Levine
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D006801:Humans; D018327:Hutchinson's Melanotic Freckle / Q000175:diagnosis*; D008297:Male; D012878:Skin Neoplasms / Q000175:diagnosis*; D013472:Sunlight / Q000009:adverse effects*