RedUrineandHematuria,Proteinuria,Edema,Hypertension)(thechildhasnoRedUrine,Hematuriaormicroscopichematuria,thoughhisbloodpressureisalittlehigh,mildhypertioncouldbeseenin15%S).PSGNdevelop5to21days(average10days)alpharyngitisinfectionsand4to6weeksafterimpetigo.(thechildhasrespiratoryinfectioushistory,butthereisnotalongtimebetweentherespiratoryinfectionandedema.)examination:UrineRoutine:50-70%patientshaveRedUrineandHematuria.almost100%patientshavemicroscoprchematuria,somemayfindWBC.ESRandASOincrease.C3decrease.30%-80%patientshavehypertion.renalfunctioncandamage.(thechildhasnoRedUrine,Hematuriaormicroscopichematuriathoughhisbloodpressureisalittlehigh,mildhypertioncouldbeseenin15%S)).Eliminationmethods:UrineRoutine,bloodpressurethePSGNisnottakenintoconsideration.鉴别诊断proteinuriaprotein4+(大于4g/d)