Poikiloderma - 皮膚異色症
皮膚異色症 (Poikiloderma) 是一種由色素沉著不足、色素沉著過度、微血管擴張和萎縮區域組成的皮膚病。 皮膚異色症 (poikiloderma) 最常見於胸部或頸部，其特徵是皮膚上出現紅色色素，通常與陽光損傷有關。
References
Poikiloderma of Civatte 是一種常見的皮膚病，主要出現在頸部和臉部，尤其是皮膚白皙的停經後女性。它表現為紅線、黑斑和薄皮膚的混合體。通常，它會影響暴露在陽光下的區域，例如臉部、頸部和胸部，但不會影響陰影區域。 Poikiloderma of Civatte 可以根據其主要特徵進行分類：發紅、黑斑或兩者兼而有之。確切原因尚不完全清楚，但陽光照射、荷爾蒙變化、對香水或化妝品的反應以及衰老等因素被認為起了一定作用。 Poikiloderma of Civatte 隨著時間的推移，情況會慢慢惡化。
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.
