Abstract
A 78-year-old man who had undergone laparoscopic ileocolic resection and lymph node dissection for ascending colon cancer visited us for follow-up. Abdominal CT revealed three nodular lesions on the surface of the liver. PET-CT revealed abnormal accumulation in all the three nodular lesions, leading to the suspicion of peritoneal recurrence of colon cancer. The possibility of residual abscess formation caused by spilled gallstones was also considered, because laparoscopic cholecystectomy (LC) for chronic cholecystitis had been performed six months earlier, and gallstones had spilled into the peritoneal cavity during the LC. Surgical excision of the tumors was performed due to possibility of peritoneal recurrence of colon cancer. Histopathological examination of the excised specimens showed that the lesions were actually abscesses. Thus, in patients presenting with peritoneal lesions after gallstone surgery, the possibility of abscess formation or granuloma formation from spilled gallstones must be borne in mind.
