The paper is concerned with lupus nephritis with marked microhematuria
. The presence of severe morphological alterations in tile kidneys, he
maturia gravity correlation with that of SLE, positive effects of acti
ve immunosuppressive treatment allow one to consider hematuria as a se
parate clinical criterion of lupus nephritis activity. A case is repor
ted of a female who had unusual clinical picture of the disease possib
ly due to high IgA in the blood and the presence of renal vasculitis.