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Greater splanchnic nerves (GSNs) and lesser splanchnic nerves (LSNs) are the dominant nerves in the pain of advanced cancer patients, which provides the base of retroperitoneal laparoscopic splanchnicectomy. We dissected 25 cadavers to provide anatomic basis for the surgery. Most GSNs entered the abdominal cavity close to the medial crus of the diaphragm while most LSNs the mid dle on . The number of the branch varies from 1 (which was 80 %) – 3. The abdominal segment length of LSNs and GSNs was 26 mm and 20 mm respectively. The mean diameter of the nerves was about 2 mm. The laparoscope was put through abdominal wall beneath the 12 th rib at t posterior axillary line, best angles and distances for the surgery were 50 ° and 80-110 mm respectively. The anatomic parameters of splanchnic nerves in the abdominal cavity as well as the angle and distance for the retroperitoneal laparoscopic splanchnicectomy and the anatomic landmarks were presented by the study. Besides the advantages of small incision, less pain and quick recovery, the anatomic par meters provided a practicable approach for the retroperitoneal laparoscopic splanchnicectomy.

The Anatomy for Retroperitoneal Laparoscopic Splanchnicectomy