黑变病即职业黑变病（Occupational melanosis） 本病又称焦油黑变病（Tarmelanosis），苔藓样中毒性黑皮炎（Melanodermatitis toxica lichenoides）。现以职业性黑变病这一名称更为恰当。
misc. melanopathy ; melanose
目的探讨结肠黑变病的临床特点。
Objective To discuss clinical characteristic of the colon black changes.
目的分析结肠黑变病的病因、镜下表现及防治措施。
Objective To analyze the pathogenesis endoscopic characteristic prevention and cure measures for melanosis coli.
黑变病，皮损常对称分布于暴露部位，呈片状，呈褐-深褐-褐黑色；
Melanosis, skin lesions often symmetrical distributed in the exposed parts, plate shaped, brown - deep brown - brown-black;
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