Fibrillary glomerulonephritis and immunotactoid glomerulopathy belong to the rare renal disorders characterized by formation of the organized glomerular deposits. Pathogenesis of these disorders is still not fully clarified but they could appear as a primary condition or be regarded as a part of the various systemic mainly lymphoproliferative disorders. Clinical presentation includes proteinuria, hematuria, arterial hypertension and progressive renal insufficiency during several years. In this work we presented a male patient with fibrillary glomerulonephritis and a female patient with immunotactoid glomerulopathy as a part of a non-Hodgkin lymphoma. The aim of this presentation is to show the features of the fibrillary glomerulonephritis and immunotactoid glomerulopathy as well as emphasize the significance of the electron microscopy in the identification of these uncommon entities.