Intra-abdominal Abscess Caused by <i>Mycobacteroides abscessus</i> in a Peritoneal Dialysis Patient: A Case Report

A 57-year-old man was diagnosed with peritoneal dialysis (PD)-associated peritonitis 2 months after surgery for tunnel infection caused by Mycobacteroides abscessus (M. abscessus). The patient was treated with multiple antibiotics, and the cell count in the PD effluent decreased. However, the patient experienced abdominal pain and developed hiccups. Computed tomography revealed an encapsulated fluid collection, indicating intra-abdominal abscess (IAA) formation. Percutaneous drainage was performed to treat IAA, and the catheter was removed. This case suggests that PD-associated peritonitis caused by M. abscessus can lead to IAA formation. If symptoms persist even after a favorable course of peritonitis, IAA should be suspected.