Emphysematous pyelonephritis. A report of two cases.

Emphysematous pyelonephritis is a suppurative infection of the renal parenchyma characterized by the production of gas by bacteria through fermentation. Although seemingly rare, this condition occurred in two diabetic patients on general medical wards over a two year period. Diagnosis, in an appropriate clinical setting, is confirmed roetgenologically. Escherichia coli is the most common etiologic organism. Despite appropriate medical and surgical intervention, this severe form of renal parenchymal infection carries a high mortality.