Unexpected diagnosis of jejunal perforation after robot-assisted radical prostatectomy.

We report a rare case of perforated jejunal diverticulitis after an unrelated surgery. A 60-year-old male presented with severe abdominal pain one day after robot-assisted radical prostatectomy. This was diagnosed as perforated jejunal diverticulitis and managed via immediate partial jejunal resection. Key points are as follows. First, surgery may have indirect impacts on diverticulitis perforation because of postoperative intestinal hypomobility and immunosuppression. Second, the diagnosis becomes harder when the perforation occurs after surgery because postoperative laboratory and imaging findings are similar to those after jejunum perforation. Hence, aggressive diagnostic evaluation and immediate treatment are crucial for improving prognosis.