Percutaneous catheter drainage in retroperitoneal abscesses: a single centre's 8-year experience.

Purpose: We have investigated the technical and clinical success of percutaneous catheter drainage (PCD) in retroperitoneal abscesses and factors that may affect the outcome.

Material and methods: The study cohort included 45 patients (17 females and 29 males, with mean age of 56.3 years) that were treated between 2012 and 2020. Forty-seven abscesses were managed with PCD under ultrasonography, computed tomography, or fluoroscopy guidance. Patients' demographics, lesion locations, predisposing factors, clini-cal presentation, etiology, radiological findings, technical factors, and outcome parameters were presented using exploratory and descriptive statistics.

Results: Abscesses were located in the psoas (n = 25, 55.3%), renal-perirenal (n = 7, 14.8%), and pararenal (n = 14, 29.7%) compartments. The mean preprocedural volume was 263.3 (30-1310) ml. Pain (abdominal and back) (57.4%) and fever (17%) were the most frequent presenting symptoms. The most common predisposing factors were previous surgery (n = 17, 36.1%) and diabetes mellitus (n = 11, 25.5%). Clinical success was attained in 89.3% of abscesses (definitive treatment 72.3% and partial success 17.0%). There was a statistically significant difference between the iatrogenic and non-iatrogenic groups regarding clinical success (p = 0.031). No mortality was encountered. The complication rate was 6.6% and were all minor. The average rate of recurrence was 10.6%. The mean time to catheter removal was 15.8 ± 13.2 days.

Conclusions: PCD is a safe and effective procedure in the treatment of retroperitoneal abscesses. Procedure-related mortality, morbidity, and complication rates are low. Underlying etiology is a significant factor affecting the outcome. Nevertheless, PCD may provide definitive treatment in the majority of patients.