[Isolated microhematuria as the manifestation of lupus nephritis]

The paper is concerned with lupus nephritis with marked microhematuria. The presence of severe morphological alterations in the kidneys, hematuria gravity correlation with that of SLE, positive effects of active immunosuppressive treatment allow one to consider hematuria as a separate clinical criterion of lupus nephritis activity. A case is reported of a female who had unusual clinical picture of the disease possibly due to high IgA in the blood and the presence of renal vasculitis.