Multiple blue nevi are rare and have been reported in several different terms. We herein report a case of agminated blue nevi and also review the literature. A 35-year-old woman was, referred to us with multiple bluish papules and macules on her right chest. A lesion appeared at birth and the number of pigmented papules thereafter gradually increased. On inspection, multiple 1 to 5 millimeter-sized bluish papules and ill-defined macules were found to have aggregated over an area measuring 48 × 22 mm in size. A histological examination revealed an aggregation of spindle shaped pigmented cells in the middermis, exclusively around hair follicles and eccrine glands, thus leading to a diagnosis of common blue nevi.
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