Figure legend:
Figure 1 . Renal biopsy specimens:
(a) Elastica-Masson trichrome staining showing no typical interstitial
fibrosis, inflammatory fibrosis, tubular atrophy, or segmental
sclerosis.
(b) Periodic acid-methenamine silver and hematoxylin-eosin staining
showing no proliferation of mesangial cells, crescentic
glomerulonephritis, or endocapillary hypercellularity.
Figure 2 . The course of the disease.