2132 Perivesicular Abscess Drainage With Axios Stent

Abstract

INTRODUCTION: Pelvic abscesses can occur as sequelae of surgery and are associated with significant morbidity and mortality. The treatment of choice for these abscesses is immediate initiation of broad-spectrum antibiotics and drainage of the collection. We propose that lumen-apposing self-expanding metal stents (LAMS) are a safe treatment option for drainage of pelvic abscesses. LAMS were originally designed for transmural pancreatic fluid collection drainage however have been successfully used for drainage of various extra-luminal fluid collections. CASE DESCRIPTION/METHODS: The patient is an obese 34-year-old female with a PMHx of IDDM, and HTN who had recently underwent ex-lap for a large non-malignant pelvic mass. On POD #5, the patient developed a fever and repeat CT revealed a multiloculated pelvic abscess measuring 5.8 × 4.2 cm. IR was unable to drain the collection in this location between bladder and rectum. Rectal EUS was performed and revealed a septated fluid collection viewed best using 7.5 mHz ultrasound at 10 cm from the anal verge. A 2 cm margin was observed between the abscess and the urinary bladder. A 2 mm margin was seen between the rectal wall and the abscess wall. A 19-gauge non-core needle was used to access the fluid collection which appeared purulent. A 15 mm AXIOS stent was then deployed using the same technique employed with pseudocyst drainage. Drainage was successful. 9 days after placement, the stent was removed using a cold snare. No bleeding resulted from stent pull. The defect was then clipped closed with a 15 mm over the scope clip. The patient tolerated the procedure well, experienced complete resolution of the abscess. DISCUSSION: Manvar et al suggest that EUS-guided LAMS drainage of pelvic abscesses is more efficacious and has a more favorable safety profile when compared to EUS-guided drainage with catheters and plastic stents. It is an efficient and safe alternative for the management of intra-abdominal and pelvic collections. This case demonstrated the novel use of a lumen-apposing self-expanding metal stent for peri-rectal abscess drainage. Although more evidence is needed for its off-label use, we conclude that it should be strongly considered as a viable treatment option if not the initial treatment modality for collections located in the pelvis.