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Depigmented halos surrounding cutaneous lesions have been the common description of many diseases, including benign melanocytic nevus, acquired blue nevi, malignant melanoma and neurofibromatosis. To the best of our knowledge, a halo around seborrheic keratosis has not been reported in the Korean dermatologic literature, and only two cases have been described abroad. Though vitiligo is known to be frequently associated with this halo phenomenon, the exact etiopathogenesis of vitiligo and the halo phenomenon is still unknown. Herein, we report on a case of halo seborrheic keratosis in a patient with vitiligo. (Korean J Dermatol 2011;49(6):554∼556)