Three cases of late-onset oligomeganephronia.

Oligomeganephronia is classified as a subgroup of renal hypoplasia, characterized by histopathologic abnormalities which progress to end-stage renal disease (ESRD) by school age. We describe three adult cases of oligomeganephronia who have not yet developed ESRD. We performed a renal biopsy in all of them. The pathological features, consisting of a reduced number of enlarged glomeruli, were diagnostic of oligomeganephronia. It was assumed that the condition had not progressed to ESRD in the patients because the degree of loss of glomeruli may have been milder than that in typical cases of oligomeganephronia.