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Updated: May 23, 2026

Point-of-Care Kidney and Genitourinary Ultrasound in Adults: Image Acquisition
Published on: June 21, 2024
Clinics in diagnostic imaging (138). Emphysematous pyelitis.
S Srinivasan1, H S Teh, M J Clarke
1Department of Diagnostic Radiology, Khoo Teck Puat Hospital, 90 Yishun Central, Singapore 768228. sivasu2@gmail.com
This case study describes a 49-year-old woman with diabetes who developed a rare kidney infection with gas in the urinary system. She presented with vague abdominal pain, and initial ultrasound showed mild kidney swelling but no clear cause. CT imaging revealed gas and fluid in the kidney, confirming the diagnosis of emphysematous pyelitis. The patient received emergency drainage and antibiotics and recovered well. The study highlights the importance of CT in diagnosing this condition, which is often missed with other imaging methods. Early detection is crucial for effective treatment and better outcomes. Patients with diabetes are at higher risk for this infection, and prompt intervention is necessary to reduce complications.
Area of Science:
- Diagnostic imaging in urology
- Infectious disease in diabetes
Background:
Gas within the urinary tract is a rare but severe condition. Prior research has shown that such infections often affect individuals with diabetes. The presence of gas in the kidney or urinary system is linked to high mortality. Early detection remains a challenge in clinical settings. No prior work had resolved the best imaging method for rapid diagnosis. This gap motivated the need for a case study to highlight the role of CT in identifying the condition. The condition is often misdiagnosed due to nonspecific symptoms. Emphysematous pyelitis is a rare but life-threatening infection.
Purpose Of The Study:
This case aimed to demonstrate the diagnostic value of CT in identifying emphysematous pyelitis. The patient had a history of diabetes and presented with vague symptoms. The goal was to highlight the importance of imaging in confirming the diagnosis. Early detection is critical for effective treatment. The study focused on the clinical and radiological features of the condition. The patient’s symptoms did not clearly indicate the infection. The purpose was to emphasize the role of CT over other imaging modalities. This case supports the need for prompt imaging in similar clinical scenarios.
Main Methods:
The patient underwent ultrasonography and computed tomography. Ultrasonography showed mild hydronephrosis but no definitive cause. CT imaging revealed gas and fluid in the kidney’s collecting system. The swollen kidney was identified as a key finding. The presence of gas within the renal system was a critical diagnostic clue. The patient was managed with emergency nephrostomy and antibiotics. The treatment approach was guided by the CT findings. The case was followed up to assess clinical recovery.
Main Results:
CT confirmed the presence of gas and fluid in the left kidney. The diagnosis of emphysematous pyelitis was made based on these findings. Emergency nephrostomy and antibiotics were initiated. The patient showed a good clinical response to treatment. She was discharged after two weeks with no complications. The presence of gas is a hallmark of this condition. The CT findings were crucial in guiding the treatment plan. The case highlights the importance of timely imaging in such infections.
Conclusions:
CT is essential for early diagnosis of emphysematous pyelitis. The authors propose that CT should be the preferred imaging method. Early detection allows prompt treatment and better outcomes. The case supports the use of CT over ultrasonography in this context. The presence of gas in the urinary tract is a key diagnostic feature. Patients with diabetes are at higher risk for this condition. The authors suggest that clinicians should consider this diagnosis in similar cases. The study emphasizes the need for rapid intervention in such infections.
Frequently Asked Questions
It is a rare, life-threatening infection in the kidney with gas in the urinary system.
CT can detect gas and fluid in the kidney, which is critical for diagnosis.
Patients with poorly controlled diabetes are at higher risk for this infection.
Gas in the kidney is a key diagnostic sign of emphysematous pyelitis.
Emergency nephrostomy and parenteral antibiotics were used for treatment.
Early diagnosis allows prompt treatment and improves patient outcomes.
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