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E-Poster Submission Deadline
Please prepare and upload your E-Poster no later than March 14, 2026 11.59PM CET. After this date, you will no longer be able to prepare and upload your E-poster and it will not be displayed and accessible on the congress website.
Please follow the instructions below to input your abstract title.
Abstract titles should be brief and reflect the content of the abstract.
Renal abscesses are an uncommon but serious complication of urinary tract infection (UTI), often arising from inadequately managed or unresolved pyelonephritis. It is frequently observed in individuals with diabetes mellitus, immunosuppression, or structural abnormalities of the urinary tract. In the Philippines, local reports of renal abscess in young, healthy adults with no known comorbidities are limited. We present a case of a young, healthy, non-diabetic female with no known comorbidities who developed a renal abscess complicated by acute kidney injury (AKI).
A 33-year-old Filipino female, non-diabetic with no structural abnormalities of the urinary tract presented with one-year history of intermittent right flank pain and fever. Diagnostic evaluation included serum creatinine, urine and renal abscess cultures, and imaging with ultrasonography of kidneys, ureter, and bladder, and computed tomography (CT) scan. Ultrasound-guided percutaneous nephrostomy tube insertion of the right kidney was performed for abscess drainage, and both urine and abscess aspirate were sent for culture and sensitivity testing. The patient was closely monitored over 2 weeks to evaluate the resolution of the renal abscess.
Initial ultrasonography revealed bilaterally enlarged kidneys with pyonephrosis, while subsequent CT scan revealed enlarged bilateral kidneys with minimal perinephric and periureteral fat stranding. Intravenous Piperacillin-Tazobactam was initiated, and the patient underwent ultrasound-guided nephrostomy tube insertion with an intra-operative finding of purulent discharge extracted from the right kidney. Urine culture revealed Enterococcus casseliflavus/gallinarum, an uncommon uropathogen, whereas renal abscess culture revealed Escherichia coli, a typical causative organism. The discrepancy likely reflected infection compartmentalization, with distinct pathogens in the urinary tract and abscess cavity. The antibiotic regimen was shifted to Ertapenem based on culture susceptibility results. The patient developed AKI Stage 2, and her renal function normalized after 2 weeks. She was discharged after 1 week on outpatient antibiotic therapy (OPAT) and was remained under regular follow-up. A repeat ultrasound showed resolution of the renal abscess after 4 weeks.
This case highlights a rare presentation of renal abscess complicated by AKI in a young, healthy, non-diabetic adult without structural urinary tract abnormalities. Early imaging, percutaneous drainage, prolonged intravenous antibiotic therapy, and supportive renal management are vital components of care. Clinicians should maintain a high index of suspicion for renal abscess in patients with persistent flank pain and fever unresponsive to antibiotic therapy for early detection and timely intervention, thereby preserving both renal function and improving overall outcomes.
