Anterior Resection of Rectal Cancer Through a One Hand-Size Incision with or without Laparoscopy: Proposal of One Hand-Size Incision Surgery (OHaSIS)

These results suggest that anterior resection for patients with rectal cancer by the OHaSIS is safe, feasible, and less invasive than conventional OS, and has sufficient operative performance. Although the survival benefit and recurrence rate by this approach must be ensured in a future trial, we would like to propose the new concept of OHaSIS for treating rectal cancer.