Emphysematous Pyelonephritis Caused by a Giant Fecaloma

Table 1

EPN classification by Huang and Tseng.

Class I	Gas in collecting system only
Class II	Parenchymal gas only
Class III-A	Extension of gas into perinephric space
Class III-B	Extension of gas into pararenal space
Class IV	EPN in solitary kidney or bilateral disease