[Laparoscopic Lateral Lymph Node Dissection for Rectal Cancer with Lateral Lymph Node Metastasis - A Case Report].

Abstract Lateral lymph node dissection(LLND)for locally advanced lower rectal cancer is the standard treatment procedure in Japan. We performed LLND with an extraperitoneal approach. Recently, we introduced laparoscopic surgery for locally advanced rectal cancer and laparoscopic LLND. We performed laparoscopic LLND in a patient havinglower rectal cancer with lateral lymph node metastasis that was detected via preoperative imaging. The patient was a woman in her 50s who experienced melena and visited a physician. Colonoscopy revealed a tumor in the lower rectum and computed tomography showed lateral lymph node swelling and liver metastasis. The patient was referred to our institution and she was diagnosed with lower rectal cancer having lateral lymph node and synchronous liver metastases. We performed laparoscopic abdominoperineal resection and laparoscopic LLND. The operatingtime was 260 min, and the blood loss was 60g. The magnification of laparoscopy enables precision in the surgical operation of the narrow pelvis during lymph node dissection, allowingautonomic nerve preservation. Therefore, laparoscopic LLND is a helpful procedure in the treatment of locally advanced rectal cancer with a lateral lymph node metastasis.