2019 Volume 18 Issue 4 Pages 222-225
A-70-year old man had a 30-year history of numerous skin colored papules on the extensor of the forearms. Similar papules were observed on the extensor sides of the lower legs, but not on the face and trunk. Histopathologically, deposition of a mucin-like substance was observed from the upper to middle layer of the dermis. These deposits, which were stained with alcian blue, disappeared after hyaluronidase digestion. No underlying diseases or complications causing mucin deposition were found. Based on the distribution of the eruption, we diagnosed this case as discrete papular lichen myxedematosus in lichen myxedematosus. As the eruption distributed at the sun-exposed parts and solar elastosis surrounded bythe lesion was histopathologicallynoted in the dermis, we speculate ultraviolet exposure to be one of the etiologies of this disease. Skin Research, 18 : 222-225, 2019
