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. 2020 Jan;36(1):S83–S86. doi: 10.12669/pjms.36.ICON-Suppl.1728

Table II.

Huang Tseng Classification.

Description
Grade 1 Gas in the collecting system
Grade 2 Renal parenchymal gas without extension
Grade 3 Perinephric/Paranephric extension of gas
Grade 4 EPN Bilaterally or in a solitary kidney