Poikiloderma
Poikiloderma 是一种由色素沉着不足、色素沉着过度、毛细血管扩张和萎缩区域组成的皮肤病。 poikiloderma 最常见于胸部或颈部，其特征是皮肤上出现红色色素，这通常与阳光损伤有关。
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Poikiloderma of Civatte 是一种常见的皮肤病，主要出现在颈部和面部，尤其是皮肤白皙的绝经后女性。它表现为红线、黑斑和薄皮肤的混合体。通常，它会影响暴露在阳光下的区域，例如面部、颈部和胸部，但不会影响阴影区域。 Poikiloderma of Civatte 可以根据其主要特征进行分类：发红、黑斑或两者兼而有之。确切原因尚不完全清楚，但阳光照射、荷尔蒙变化、对香水或化妆品的反应以及衰老等因素被认为起了一定作用。 Poikiloderma of Civatte 随着时间的推移，情况会慢慢恶化。
Poikiloderma of Civatte (PC) is a rather common benign dermatosis of the neck and face, mainly affecting fair-skinned individuals, especially postmenopausal females. It is characterized by a combination of a reticular pattern of linear telangiectasia, mottled hyperpigmentation and superficial atrophy. Clinically, it involves symmetrically sun-exposed areas of the face, the neck, and the V-shaped area of the chest, invariably sparing the anatomically shaded areas. Depending on the prevalent clinical feature, PC can be classified into erythemato-telangiectatic, pigmented, and mixed clinical types. The etiopathogenesis of PC is incompletely understood. Exposure to ultraviolet radiation, hormonal changes of menopause, contact sensitization to perfumes and cosmetics, and normal ageing have been incriminated. The diagnosis is usually clinical and can be confirmed by histology, which is characteristic, but not pathognomonic. The course is slowly progressive and irreversible, often causing significant cosmetic disfigurement.
Poikiloderma of Civatte (PC) is a rather common benign dermatosis of the neck and face, mainly affecting fair-skinned individuals, especially postmenopausal females. It is characterized by a combination of a reticular pattern of linear telangiectasia, mottled hyperpigmentation and superficial atrophy. Clinically, it involves symmetrically sun-exposed areas of the face, the neck, and the V-shaped area of the chest, invariably sparing the anatomically shaded areas. Depending on the prevalent clinical feature, PC can be classified into erythemato-telangiectatic, pigmented, and mixed clinical types. The etiopathogenesis of PC is incompletely understood. Exposure to ultraviolet radiation, hormonal changes of menopause, contact sensitization to perfumes and cosmetics, and normal ageing have been incriminated. The diagnosis is usually clinical and can be confirmed by histology, which is characteristic, but not pathognomonic. The course is slowly progressive and irreversible, often causing significant cosmetic disfigurement.
