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Refractory Retroperitoneal Abscess Caused by Hypermucoviscous Klebsiella pneumoniae Requiring Open Surgical Drainage

Year: 2026

Type: article

Abstract: ABSTRACT Introduction Klebsiella pneumoniae is broadly classified into classical and hypervirulent pathotypes, with the latter associated with invasive infections and hematogenous dissemination. Case Presentation An 89‐year‐old woman presented with fever and fatigue. Imaging revealed a large retroperitoneal abscess. Klebsiella pneumoniae was isolated from both pus and urine cultures, and the string test was positive. The clinical response to nonsurgical treatment was poor; however, definitive infection control was achieved after open surgical drainage. Conclusion This case highlights serial reassessment and kidney‐preserving open drainage for string test‐positive infection refractory to percutaneous source control.

Source: IJU Case Reports

DOI: 10.1002/iju5.70287