脂溢性皮炎.ppt

脂溢性皮炎
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Seborrheic Dermatitis
also known as "seborrheic eczema “
is an inflammatory skin disorder affec脂溢性皮炎
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Seborrheic Dermatitis
also known as "seborrheic eczema “
is an inflammatory skin disorder affecting the scalp, face, and trunk causing scaly, flaky, itchy, red skin.
It particularly affects the sebum-gland rich areas of skin.
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Etiology
The cause of seborrhoeic dermatitis remains unknown
Malassezia globosa, may play a role.
Seborrhoeic dermatitis may be aggravated by illness, psychological stress, fatigue, change of season and reduced general health.
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Etiology
Neurologic conditions, including Parkinson's disease, head injury, and stroke may be associated with seborrheic dermatitis.
Human immunodeficiency virus (HIV) has also been linked to increased cases of seborrheic dermatitis.
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Etiology
In children, excessive vitamin A intake can cause seborrhoeic dermatitis.
Lack of vitamin B6 and vitamin B2 may also be a cause
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Etiology and Pathogenesis
遗传性皮脂溢出
感染马拉色菌、痤疮丙酸杆菌等
皮脂成分改变
感染性变态反应
脂溢性皮炎
精神、饮食、维生素B缺乏、嗜酒
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Clinical Manifestation
Seborrheic dermatitis can occur on many different body areas. Typically it forms where the skin is oily or greasy.
Lesion papule oily and yellow scales ,
severe cases, yellowish to reddish scaly papule appear along the hairline, behind the ears, ear canal, eyebrows, bridge of the nose, around the nose, chest, back.
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Clinical Manifestation
in some cases hair loss
Itching-- may become more itchy if infected
Infants younger than three months thick, oily, yellowish crust around the hairline and on the scalp
Course last from few weeks to even years
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头皮脂溢性皮炎
鳞屑型 常呈红斑或红色毛囊丘疹并有小片糠秕状脱屑，头发干燥、细软、稀疏或脱落
结痂型 头皮厚积片状、粘着油腻性黄色或棕色痂，痂下炎症明显，间有糜烂、渗出
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Diagnosis
Site
Typical lesion
Chronic course
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