白癜风是一种后天性黑色素脱失性皮肤病。
背景：白癜风是一种获得性的皮肤色素脱失性疾病。
BACKGROUND: Vitiligo is an acquired skin disorder caused by the disappearance of pigment cells from the epidermis.
目的：白癜风是一种以色素脱失为特征的常见皮肤病。
Objectives: Vitiligo is a common skin disorder characterized by depigmentation.
白癜风是一种色素脱失性疾病，目前病因不明，缺乏特异性治疗。
Vitiligo is a skin depigmentation disorder of unknown etiology, without specific treatment.
目的白癜风是一种以皮肤色素脱失为主要表现的获得性、色素障碍性疾病。
Objective Vitiligo is an acquired disorder of depigmentation characterised by the loss of pigment from epidermis.
出生时即发现躯干有大片黑褐色斑片，6年前开始全身出现散在色素脱失斑。
The scattered hypopigmented patches began to appear6years ago, and sp read to the whole body.
结果：2例患者的皮肤色素脱失处基底层均未见黑素颗粒，符合白癜风的病理改变；
Results: There was no melanin granule in basal cell layer in depigmented skin of 2 cases, which coincided in the pathogenic change of vitiligo.
主要表现为色素脱失、色素沉着及掌跖过度角化，具此三联症者72例（7．35％）。
The main manifestation was hypopigment, hyperpigment, and palmoplantar Hyperkeratosis. Triad cases happened in 72 patients (7.35%).
但是在世界上的某些地区，比如中非，由于基因突变而导致的白化病或色素脱失的婴儿会导致人们的害怕和迷信，有时甚至会被杀死。
But in some parts of the world, such as central Africa, mutations that result in albinism (or a significant depigmentation) of a baby can provoke fear and superstition and sometimes even infanticide.
白癜风是由于皮肤和毛囊的黑素细胞内酪氨酸系统的功能减退、丧失引起的，是一种以局限性或泛发性皮肤色素脱失为特征的疾病。
Vitiligo is a condition in which the tyrosine system in pigment cells are destroyed , resulting in irregularly shaped white patches on the skin.
白癜风是由于皮肤和毛囊的黑素细胞内酪氨酸系统的功能减退、丧失引起的，是一种以局限性或泛发性皮肤色素脱失为特征的疾病。
Vitiligo is a condition in which the tyrosine system in pigment cells are destroyed , resulting in irregularly shaped white patches on the skin.
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