There is moderate, patchy tubular atrophy. Occasional tubules contain granular casts. The intrarenal arteries and arterioles show mild chronic changes. There is no evidence of active vasculitis. The renal tissue examined by immunofluorescence contains six non-sclerotic glomeruli, two sclerotic glomeruli, two small arteries and nine arterioles.
Direct immunofluorescence is performed using a panel of ten antisera.