下期预告：创伤性脱发（Traumaticalopecia)
keywords:
anagen(生长期）,catagen（退行期）,telogen（休止期）
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斑秃的鉴别诊断Differentialdiagnosis
Thedifferentialdiagnosisofalopeciaareataisbasedonwhethertheclinicalpatternofhairlossislocalizedordiffuse.
斑秃的鉴别诊断根据脱发的模式是局限性还是弥漫性来判断。
Incaseswithlocalizedareasofhairloss,thedifferentialdiagnosisincludestrichotillomania,triangulartemporalalopecia,syphilis,discoidlupuserythematosus,lichenplanopilaris,frontalfibrosingalopecia,pseudopélade,andtineacapitis.
对于局限性脱发，鉴别诊断包括拔毛癖，颞部三角形脱发，梅毒，盘状红斑狼疮，毛发扁平苔藓，前额纤维化脱发，假性斑秃和头癣。
Trichotillomaniamaycloselysimulatealopeciaareatabutmicroscopicexaminationoftheformerconditionshowsmorepigmentedcasts,anabsenceofminiaturizedhairs,andminimalinflammatoryinfiltrate.Triangulartemporalalopeciashowsnoclinicalorhistologicalevidenceofinflammationandthereisnoexcessofhairfolliclesintelogenorcatagen.Alopeciasyphiliticamaybeverysimilarbutclinicallytheplaquesrarelyshow北京治疗白癜风需多少钱哪家医院治疗白癜风