Peristomal pyoderma gangrenosum (PPG), a variant of pyoderma gangrenosum, occurs adjacent to intestinal or urinary stomas and are typically seen in patients with active inflammatory bowel diseases (IBD). The present study evaluated 14 cases of PPG among 537 patients that had undergone ostomy surgery at Asahikawa Medical University Hospital from January 2017 to December 2021. The incidence of PPG among ostomy cases was calculated as 1.01 per 100-person-years. The median period from ostomy surgery to PPG onset was 192.5 days (36-1224 days). Significant differences in gender and ostomy subtype were observed in patients with PPG compared to all patients that had undergone ostomy surgery. IBD prevalence was comparable between groups. Topical corticosteroids or tacrolimus were sufficient for controlling PPG lesions in all cases other than one case controlled with oral prednisolone administered for a separate condition. Clinicians should be aware of recent developments in IBD therapies that may modify the risk of developing PPG. The present study results add to current knowledge of the pathogenesis of PPG.
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