Spontaneous bacterial peritonitis is defined as an ascitic fluid infection without an evident intra-abdominal surgically treatable source. The diagnosis is established by a positive ascitic fluid bacterial culture and an ascitic fluid absolute polymorphonuclear leukocyte(PMN)count≥250 cells/μL. Here we report the case of 81-year-old female patient who was diagnosed with spontaneous bacterial peritonitis after gastrectomy for gastric cancer. The laparoscopic distal gastrectomy and D1+ lymph node dissection were performed for Stage Ⅰ gastric cancer, and the postoperative course was uneventful. The patient presented with abdominal pain and was hospitalized again on the third day from the discharge. Computed tomography showed an accumulation of ascites, and the ascitic fluid polymorphonuclear leukocyte count was 9,973 cells/μL. The patient was diagnosed with spontaneous bacterial peritonitis, and antibacterial agent was performed. Abdominal pain and accumulation of ascites had been improved, and the ascitic fluid polymorphonuclear leukocyte count had decreased clearly. The patient discharged on the 57th day from the operation. Spontaneous bacterial peritonitis after gastrectomy for gastric cancer was rare. We report this rare case, along with a discussion of the literature.
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