A 66-year-old man presented with linear lesions of 5-years duration on his right lower extremity along Blaschko's lines. Physical examination showed hyperpigmented and violaceous papules with hypopigmented centers that were surrounded by fine, raised hyperkeratototic rims. The lesions were characteristic of porokeratosis, and the diagnosis was confirmed by histopathological examination. Associated medical conditions and treatment modalities are reviewed.