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1·Leptomeningeal melanosis is malignant in 40-50% of patients with neurocutaneous melanosis.

在40 - 50%的神经皮肤黑变病的患者中软脑膜黑色素沉着是恶性的。

2·Melanosis coli is mainly related with constipation and abuse of laxatives and possibly related with neoplasm.

结肠黑变病病因主要与便秘和服泻药有关，结肠黑变病与肿瘤可能有一定的关系。

3·Objective To analyze the pathogenesis endoscopic characteristic prevention and cure measures for melanosis coli.

目的分析结肠黑变病的病因、镜下表现及防治措施。

4·Riehl's melanosis is a pigmented dermatitis that develops over the face and neck, which affects the appearance of patients.

瑞尔黑变病是一种发生在面颈部的色素沉着性皮肤病，严重影响患者容貌。

5·Melanosis, skin lesions often symmetrical distributed in the exposed parts, plate shaped, brown - deep brown - brown-black;

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；

6·Methods 30 patients with melanosis coli was reviewed with clinical symptoms, electron endoscopy features and pathological characters.

方法回顾性总结、分析30例结肠黑变病的临床表现、电子结肠镜检查、病理诊断资料。

7·Benign leptomeningeal melanosis occurs when there are areas of proliferation of sheets or nests of melanocytes without frank malignant change.

良性的软脑膜黑色素沉着发生在黑色素细胞巢或细胞床增殖区域，不伴有明显的恶性变。