Recurrence of the original disease in the renal graft occurs frequentl
y, but it seldom leads to graft failure. In patients with glomerulonep
hritis as the original disease, graft survival is lower than in patien
ts with non-recurring diseases. Since the use of cyclosporine the actu
arial graft survival of both groups became identical. Analysis of the
data indicates a nonspecific action of cyclosporine, possibly on the g
lomerular hemodynamics. The risk of recurrence is higher with living d
onors. The multiplicity of the factors involved make it difficult to d
etermine the risk of recurrence in an individual patient on the basis
of the general data from the literature.