Melanosis - English spelling

Japanese: 黒皮症 - こくひしょう（英語表記）melanosis

A condition in which pigmentation occurs later in the whole body or in parts of the skin, appearing as black-brown, brown, or purple-gray. In Addison's disease, prominent pigmentation is seen in areas that are physiologically rich in pigment, but in this disease, severe pigmentation is also seen in the palms of the hands, soles of the feet, and oral mucosa. In a disease called Lille melanosis or female facial melanosis, itchy erythematous, desquamating lesions appear on the female face, and later purple-gray pigmentation appears. Redness and small papules may also be present. The cause of the disease is often a skin rash caused by cosmetics.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

全身あるいは一部の皮膚に後天性に色素が沈着して，黒褐色，褐色，紫灰色などを呈した状態。アジソン病では生理的に色素の多い部位に顕著な沈着がみられるが，本症ではそれ以外に手掌，足底，口腔粘膜などにも高度の色素沈着を認める。リール黒皮症あるいは女子顔面黒皮症と呼ばれる疾患では，女子の顔面に瘙痒性の紅斑落屑性病変が生じ，のちに紫灰色の色素沈着をみる。発赤や小丘疹を伴うこともある。病因の多くは化粧品かぶれである。

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