Endoscopic ultrasound-guided transrectal drainage of a pelvic abscess after Hinchey II sigmoid colon diverticulitis: A case report.

Background: Acute diverticulitis is one of the most prevalent complications of diverticular disease and may result in abscess formation, perforation, fistula formation, obstruction, or bleeding. Diverticular abscesses may be initially treated with antibiotics and/or percutaneous drainage and/or surgery. Endoscopic ultrasound (EUS)-guided drainage techniques are increasingly used as a minimally invasive alternative to percutaneous or surgical approaches, as they are associated with better treatment outcomes, shorter recovery time and duration of hospitalization.

Case Summary: A 57-year-old female presented to the emergency department on account of abdominal pain and fever. Clinical examination revealed tenderness in the left lower abdominal quadrant, with elevated inflammatory markers in laboratory tests. Abdominal computed tomography (CT) revealed an 8 cm × 8 cm × 5 cm well-encapsulated abscess of the sigmoid colon, surrounded by numerous diverticula. A diagnosis of Hinchey II diverticular abscess was made, and the patient was admitted and commenced on appropriate antibiotic treatment. A transrectal EUS showed a fluid collection in direct contact with the sigmoid colon. Transluminal drainage was performed, and a lumen-apposing metal stent was inserted into the abscess collection. A follow-up CT scan showed a regression of the collection. The patient's general condition improved, and the stent was removed during a follow-up transrectal EUS that revealed no visible collection.

Conclusion: We report the first successful management of a pelvic abscess in patient with Hinchey II acute diverticulitis using EUS-guided transluminal drainage in Slovenia. The technique appears effective for well-encapsulated intra-abdominal abscesses larger than 4 cm in direct contact with the intestinal wall of left colon.