Insudative hyalin cap lesions of diabetic glomerulosclerosis

Peripheral hyalin cap lesions of glomerular capillaries are a common finding in diabetic renal disease. Although these have been referred to as exudative in nature, most studies ascribe an insudative process in their pathogenesis. We report a case of diabetic renal disease in which glomeruli demonstrated both late and early developmental stages of peripheral cap lesions in which the presence of plasma constituents was indicative of an insudative process.