Two young men with anti-glomerular basement membrane (anti-GBM) antibody-induced Goodpasture's syndrome are described. Despite the characteristic renal morphological features and high titers of anti-GBM antibody, they had normal renal function. Both patients recovered spontaneously without treatment and remain well with normal renal function more than four years after presentation. The use of more sensitive diagnostic techniques has demonstrated that there is a broad spectrum of clinical severity in this disease and that mild cases can be expected to have a good outcome.