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Infected renal cysts: sonographic diagnosis and management
E Frishman1, D E Orron, Z Heiman
1Department of Diagnostic Radiology, Tel-Aviv Sourasky Medical Center, Israel.
Summary
Infectious renal cysts (IRC) present with fever and flank pain. Sonography revealed abnormal cyst contents, and aspiration relieved symptoms, suggesting IRC may be more common than thought.
Area of Science:
- Nephrology
- Radiology
- Infectious Diseases
Background:
- Infectious renal cysts (IRC) are rare, presenting with fever and flank pain unresponsive to antibiotics.
- Previous reports emphasized cyst wall thickening as a key sonographic sign of infection.
Purpose of the Study:
- To describe sonographic findings and outcomes of treating infectious renal cysts.
- To evaluate the utility of sonographically guided aspiration and drainage for diagnosis and symptom relief.
Main Methods:
- Retrospective analysis of nine infectious renal cysts in eight patients.
- Sonographic evaluation focusing on cyst content echogenicity and wall characteristics.
- Sonographically guided cyst aspiration and drainage for diagnosis and treatment.
Main Results:
- The predominant sonographic finding was abnormal echogenic texture of cyst contents, not wall thickening.
- Sonographically guided aspiration and drainage of eight cysts provided diagnostic material.
- Symptomatic relief was achieved in seven patients following cyst aspiration and drainage.
Conclusions:
- Abnormal echogenic texture of cyst contents is a key sonographic finding in infectious renal cysts.
- Sonographically guided aspiration and drainage are effective for diagnosis and symptom management.
- Infectious renal cysts may be more prevalent than previously recognized.