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The lack of well-established diagnostic criteria for pigmented solar (actinic) keratosis (PSK) along with its poorly understood etiopathogenesis has contributed to underrecognition.The clinical, dermatoscopic, and histopathologic features of PSK and the cause of the pigmentation are elucidated.In all, 167 histologic specimens, 22 clinical images, and 17 dermatoscopic images of PSK were reviewed. In...
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