A 24 year old male diagnosed of type II diabetes mellitus of 2 years o
f known clinical evolution discovered by an episode of hyperglycemic d
ecompensation without ketoacidosis is presented. In the study of possi
ble visceral involvement of the disease agenesis of the left kidney wi
th compensating hypertrophy of the right kidney, increase of glomerula
r filtrate and proteinuria of 1.8 g/24 hours were observed. Renal hist
ologic study demostrated the existence of diffuse intercapillar glomer
ulosclerosis compatible with diabetic glomerulopathy. From these data
and review of the literature the possibility of the greater risk of in
dividuals with a single kidney to present nephropathy in the case of c
oexistence of associated diabetes mellitus.