理因素均可引起本病。某些疾病,如风湿热、结
缔组织病也可出现多形红斑样皮损,临床上将病
因不名的称特发性多形红斑,病因明确的称症状
性多形红斑
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痤疮
Acne neonatorum is a benign, self-limited,
acneiform eruption that develops within
child. 婴儿痤疮:5个月患儿脸颊上散在的炎症丘 疹和脓疱疮。
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皮肤紫癜
Henoch–Sch鰊lein purpura Hemorrhagic macules, papules, and urticarial
lesions on the legs of an adolescent.
daily application of 2% ketoconazole cream.
新生儿痤疮:多发性痤疮样脓疱疮(左)和每天两次2%酮康唑乳膏应用一周后
(右) 。
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Acne vulgaris A. Scattered inflammatory papules and pustules on the cheek of an adolescent.B. Scattered inflammatory papules, pustules, and nodules on
(Reproduced with permission from IM Freedberg et al. Dermatology in General Medicine. 5th ed.
New York, NY: McGraw-Hill; 1999.)
光敏性荨麻疹:受太阳照射背部15分钟后出现荨麻疹病变。