环状发：2个美国家庭的报告。
Pili annulati: a report of 2 American families.
作者信息
Berk David R, Bayliss Susan J, Giehl Kathrin A
机构信息
Division of Dermatology, Departments of Internal Medicine and Pediatrics, Washington University School of Medicine, 660 S Euclid Ave, Campus Box 8123, St Louis, MO 63110, USA.
出版信息
Cutis. 2013 May;91(5):254-7.
Pili annulati (PA) is a rare, benign, autosomal-dominant or sporadic hair shaft disorder characterized by scalp hair with a banded or speckled appearance. We present 2 American families with PA and highlight the characteristic clinical and microscopic features. Among the 2 families, a total of 11 individuals with PA were identified, spanning 3 generations in family 1 and 4 generations in family 2.
结节性脆发症（PA）是一种罕见的、良性的、常染色体显性或散发性的毛干疾病，其特征是头皮毛发呈现带状或斑点状外观。我们报告了2个患有PA的美国家庭，并强调了其特征性的临床和显微镜下特征。在这2个家庭中，共确定了11名患有PA的个体，其中家庭1跨越3代，家庭2跨越4代。
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