How is tx of retroperitoneal abscesses?

Percutaneous drainage may be attempted in well-defined uniloculated abscesses Percutaneous catheter drainage is less successful for retroperitoneal abscesses than for intra-abdominal abscesses Most patients require open surgical debridement and drainage, ideally through an extraperitoneal flank approach, and systemic empiric antibiotics that cover aerobic and anaerobic enteric organisms