We encountered a case of giant appendiceal mucinous neoplasm that was treated with laparoscopic surgery. The patient was a 77-year-old man with constipation. Lower endoscopy demonstrated a giant SMT-like tumor in the cecum, and abdominal computed tomography revealed a giant appendiceal mucinous neoplasm and nearby lymph nodes swelling. Hematological examination showed an elevated serum CEA level. We performed laparoscopic ileocecal resection for a definite diagnosis and treatment. The postoperative course was uneventful. The pathological diagnosis was low-grade appendicealmucinous neoplasm(LAMN). Laparoscopic surgery can be considered safe for the resection of appendicealmucinous neoplasm when it is performed with a carefulsurgicalapproach.
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