关键词: 痣, 色素, 湿疹, Meyerson痣

Abstract: 【Abstract】 Objective To investigate clinical and histopathological features of Meyerson nevus. Methods Clinical and histopathological data were collected from 6 patients with confirmed Meyerson nevi in Department of Dermatology, the Fourth Military Medical University from January 2015 to January 2019, and retrospectively analyzed. Results Among the 6 patients, 3 were males and 3 were females, with a median age of 10.5 years （range, 7 months to 28 years）. Skin lesions were located on the extremities of 3 cases, as well as on the trunk of 3 cases. Meyerson nevi arose from congenital pigmented nevi in 4 cases, as well as from acquired pigmented nevi in 2 cases. The duration of pigmented nevi varied from 7 months to 18 years. Four patients felt itching in the past 2 months, and 2 had no concomitant symptoms such as itching. Central pigmented nevi manifested as papules in 5 cases and a plaque in 1 case, which were brown or black in color, with regular shapes, uniform pigmentation and clear borders. Pigmented nevi were surrounded by a halo of erythema in 6 cases, and skin lesions were covered with scales or crusts in 4 cases. Histopathological examination of Meyerson nevi revealed characteristics of both pigmented nevus and eczema. Histopathologically, pigmented nevi manifested as junctional nevi or compound nevi, and eczema manifested as serous exudation, irregular epidermal hyperplasia, spongiosis and perivascular infiltration of lymphocytes in the superficial dermis. Conclusions Meyerson nevus is rare, and mostly occurs on the trunk and extremities. When itching occurs or erythema appears around the pigmented nevus, the diagnosis of Meyerson nevus should be considered.

Key words: Nevus, pigmented, Eczema, Meyerson nevus