Laparoscopic IIeocecus-Sparing Right Hemicolectomy for Cancer of the Hepatic Flexure and Proximal Transverse Colon

Our study is a single arm, single center clinical trial. The enrolled patients will accept laparoscopic ileocecus-sparing right hemicolectomy. The primary endpoint: postoperative complications, 1-year local recurrence. The second endpoint: conversion to conventional right hemicolectomy, time to first flatus after surgery, number of harvested lymph nodes, 3-year disease free survival, R0 resection, Specimen morphometry

Inclusion criteria

• Patients suitable for curative surgery 18-75years old
• ASA grade I-III
• Qualitative diagnosis: a pathological diagnosis of adenocarcinoma;
• Localization diagnosis: the tumor located at hepatic flexure and proximal transverse colon(proximal to the right branch of middle colic artery);
• Enhanced CT scan of chest, abdominal and pelvic cavity: assessment of tumor stage is T1-T4N0 or TanyN+; there is no distant metastasis.
• Intraoperative measurement: the distance between colic branch of ileocolic artery and proximal edge of the tumor should be longer than 5cm.
• Informed consent

Exclusion criteria

• Simultaneous or metachronous multiple primary colorectal cancer;
• History of familial adenomatous polyposis, ulcerative colitis or Crohn's disease.
• Preoperative imaging examination results show: fused lymph node at the root of ileocolic artery.
• Distant metastasis.
• History of any other malignant tumor in recent 5 years.
• Patients need emergency operation.
• Not suitable for laparoscopic surgery (i.e., extensive adhesion caused by abdominal surgery, not suitable for artificial pneumoperitoneum, etc).
• Informed consent refusal