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CLINICAL IMAGE
Year : 2018  |  Volume : 148  |  Issue : 6  |  Page : 759-760

Emphysematous pyelonephritis: Diagnostic pearls in imaging


1 Department of Radiodiagnosis & Interventional Radiology, Kerala Institute of Medical Sciences, Thiruvananthapuram 695 029, India
2 Department of Radiodiagnosis & Interventional Radiology, Amrita Institute of Medical Sciences & Research Centre, Kochi 682 041, Kerala, India

Date of Submission21-Jan-2017
Date of Web Publication12-Feb-2019

Correspondence Address:
Anirudh V Nair
Department of Radiodiagnosis & Interventional Radiology, Kerala Institute of Medical Sciences, Thiruvananthapuram 695 029
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijmr.IJMR_114_17

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How to cite this article:
Nair AV, Ramachandran P V. Emphysematous pyelonephritis: Diagnostic pearls in imaging. Indian J Med Res 2018;148:759-60

How to cite this URL:
Nair AV, Ramachandran P V. Emphysematous pyelonephritis: Diagnostic pearls in imaging. Indian J Med Res [serial online] 2018 [cited 2019 Sep 21];148:759-60. Available from: http://www.ijmr.org.in/text.asp?2018/148/6/759/252151

†Patient's consent obtained to publish clinical information and images.


A 19 yr old woman presented to the emergency room of the Amrita Institute of Medical Science and Research Centre, Kochi, Kerala, India, in January 2014, with a history of high-grade fever and reduced urine output since the last five days. No history of diabetes mellitus was observed. Total cell count was 22,640/μl, with neutrophil predominance of 90 per cent, erythrocyte sedimentation rate (ESR) 60 mm/h and routine urine testing showed plenty of pus cells. Abdominal radiograph [Figure 1]A showed right renal silhouette to be replaced by multiple streaky and mottled air density with perinephric air limited by perinephric space and tracking into the right paracolic gutter. Computed tomography (CT) abdomen plain [Figure 1]B and [Figure 1]C showed >50 per cent of right renal parenchyma replaced by intrarenal air.
Figure 1: (A) Abdominal radiograph showing right renal silhouette being replaced by multiple streaky and mottled air density (arrowhead) with perinephric air limited by perinephric space and tracking into right paracolic gutter (white arrow). (B) Axial, and (C) coronal non-contrast computed tomography abdomen showing right renal parenchyma replaced by intrarenal air (star), with air tracking into right ureter (green arrow) and into perinephric space (red arrow).

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There was associated air tracking all along the length of the right ureter into the urinary bladder. Perirenal, anterior pararenal and posterior pararenal spaces on the right showed air tracking. There was no evidence of fluid collection. Features suggestive of Grade 3b (Huang-Tseng CT classification) right emphysematous pyelonephritis were also noted. Urine culture and sensitivity showed  Escherichia More Details coli. She subsequently underwent open drainage with 'double-J' stenting. The patient improved with antibiotics and was discharged. Follow up ultrasound scan done elsewhere after eight weeks, showed no residual air or perinephric collection.

Acknowledgment: Authors thank Dr P. Ginil Kumar, Department of Urology, Amrita Institute of Medical Science, Kochi, Kerala, India, for providing clinical assistance.

Conflicts of Interest: None.




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