文档介绍：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.
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.
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.
Etiology
In children, excessive vitamin A intake can cause seborrhoeic dermatitis.
Lack of vitamin B6 and vitamin B2 may also be a cause
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
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.
Clinical Manifestation
in some cases hair loss
Itching-- may e 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
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