EP372 - Early experience of SP-robot-TAMIS comparing with conventional TAMIS for rectal neoplasm

Sunday, May 11, 2025

8:32 AM – 8:37 AM PT

Location: Monitor 10, Sails Pavilion, Upper Level

ePoster Presenter(s)

IK

In Kyeong Kim

Clinical assistant professor
Seoul St.Mary's hospital, The Catholic University of Korea
Seoul, Seoul-t'ukpyolsi, Republic of Korea

All of the relevant financial relationships listed below have been mitigated.
This individual has no financial relationships with ineligible companies.

Senior Author(s)

Yoon Suk Lee, n/a

Professor
Seoul St. Mary’s Hospital, College of Medicine, the Catholic University of Korea
Seocho gu, Seoul-t'ukpyolsi, Republic of Korea

All of the relevant financial relationships listed below have been mitigated.
This individual has no financial relationships with ineligible companies.

Author(s)

JB

Jung Hoon Bae, n/a

Assistant Professor
Seoul St.Mary's hospital, The Catholic University of Korea
Catholic University of Korea
Seoul, Seoul-t'ukpyolsi, Republic of Korea

All of the relevant financial relationships listed below have been mitigated.
This individual has no financial relationships with ineligible companies.
IL

In Kyu Lee, n/a

Professor
Seoul St.Mary's hospital, The Catholic University of Korea
Seoul, Seoul-t'ukpyolsi, Republic of Korea

All of the relevant financial relationships listed below have been mitigated.
This individual has no financial relationships with ineligible companies.
NY

Nina Yoo

Clinical Assistant Professor
St. Vincent's Hospital
Suwon-si, Kyonggi-do, Republic of Korea

All of the relevant financial relationships listed below have been mitigated.
This individual has no financial relationships with ineligible companies.
NY

Nina Yoo, n/a

Assistant professor
St. Vincent's Hospital
Suwon, Kyonggi-do, Republic of Korea

All of the relevant financial relationships listed below have been mitigated.
This individual has no financial relationships with ineligible companies.
BK

Bong Hyeon Kye, n/a

Professor
St. Vincent's Hospital
Suwon-si, Kyonggi-do, Republic of Korea

Disclosure information not submitted.
HC

Hyeon Min Cho, n/a

Professor
St. Vincent's Hospital
Suwon-si, Kyonggi-do, Republic of Korea

Disclosure information not submitted.

All of the relevant financial relationships listed below have been mitigated.

In Kyeong Kim: This individual has no financial relationships with ineligible companies.

Yoon Suk Lee, n/a: This individual has no financial relationships with ineligible companies.

Jung Hoon Bae, n/a: This individual has no financial relationships with ineligible companies.

In Kyu Lee, n/a: This individual has no financial relationships with ineligible companies.

Nina Yoo: This individual has no financial relationships with ineligible companies.

Nina Yoo, n/a: This individual has no financial relationships with ineligible companies.

Image or Table (Do Not add text here):

Purpose/Background: Transanal approach for rectal neoplasm have evolved from transanal local excision, transanal endoscopic microsurgery (TEM), to transanal minimally invasive surgery (TAMIS). TAMIS was introduced in 2020, which employs a single port laparoscopic approach to access the rectum for tumor resection. However, using straight instruments without joints still poses challenges in the dissection of tumors located in the narrow and curved anal canal.
Recently, robotic surgery has provided improved maneuverability through articulating instruments, and better visualization, which helps in accessibility and efficiency. The advancements in single port (SP) robot platform aim to maximize these benefits and the transanal approach.
This study aims to conduct a comparative analysis of surgical efficiency and short-term clinical and oncological outcomes between laparoscopic TAMIS and SP robotic platforms for rectal tumor resections.

Methods/Interventions: This study was a retrospective, multicenter study that enrolled patients who underwent single port laparoscopic (LAP) or robotic TAMIS (SPR) for rectal tumors at Seoul St.Mary’s hospital and St.Vincent’s hospital from January 2016 to August 31, 2024. Preoperative evaluation was performed using endoscopy and abdominal image such as CT or MRI. Patients with clinical stage T1 orN0, well to moderately differentiated tumor, and low-risk feature were included.

Results/Outcomes: A total of 42 patients underwent procedures at two institutions, including 15 in the SPR group and 27 in the LAP group. There was no significant difference in age and gender distribution between the two groups (SPR vs LAP; 51.13±15.34 vs. 51.04±12.39, p=0.984). The distance from the anal verge to the rectal tumor was 6.14±2.08 in the SPR group and 7.37±2.53 in the LAP group, with no significant difference. Intraoperative outcomes included that the SPR group had 13 patients (86.7%) in the prone position, while the LAP group had 24 patients (88.9%) in the lithotomy position. There were no significant differences in the mean operative time between the two groups (SPR vs. LAP, 61.20±32.31 vs. 50.26±24.09; p=0.264). All patients underwent full thickness excision, and there were no intraoperative complications. In the postoperative and pathological results, the lateral and basal margins were obtained without significant differences between the two groups, and all resection margins were negative. The postoperative length of hospital stay was significantly shorter in the SPR group (1.67±1.05 days) than in the LAP group (3.33±0.734 days).

Conclusion/Discussion: In conclusion, this study highlights the comparative effectiveness of SPR-TAMIS versus LAP-TAMIS for rectal tumor resections. Both techniques demonstrated no significant differences in clinical and oncological outcomes. These findings suggest that SPR platforms may offer enhanced efficiency and postoperative recovery, especially considering the challenges associated with accessing the narrow anal canal.