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About

Dr. Toshiya Nagasaki is a leading colorectal surgeon whose work centers on advancing minimally invasive and robotic approaches for rectal and colorectal cancers. His most impactful contribution is a seminal 2020 paper on laparoscopic and robotic lateral lymph node dissection for rectal cancer (33 citations), which addresses a critical challenge: lateral nodal disease remains a major cause of local recurrence even after neoadjuvant therapy and total mesorectal excision. Dr. Nagasaki has also pioneered techniques for complex, multi-quadrant surgeries, including the first case series on simultaneous robotic-assisted laparoscopic surgery for synchronous rectal and prostate cancers (11 citations). His research emphasizes standardization and patient outcomes, as shown in a large retrospective study (519 patients) on preoperative stoma site marking to prevent leakage, and novel approaches like the umbilical minilaparotomy-first technique and medial mobilization for robotic right hemicolectomy. By systematically refining robotic and laparoscopic protocols—from lateral node dissection to extralevator abdominoperineal resection with en bloc multivisceral resection—Dr. Nagasaki is helping to lower recurrence rates and improve surgical precision, making him a key figure in the evolution of modern colorectal cancer surgery.