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Sunday, November 7, 2021

Implementation of robot‐assisted curative resection for rare anorectal tumors on the basis of individualized treatment

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Abstract

Purpose

To evaluate the validity of robot-assisted curative operation for rare anorectal tumors, characterized by biological heterogeneity and anatomical complexity.

Methods

The present study evaluated 16 consecutive patients including three with anorectal squamous cell carcinoma (ARSCC), four with anorectal mucosal melanoma (ARMM), seven with anorectal neuroendocrine tumor (ARNET), and two with other types of anorectal tumors.

Results

Of the three patients with ARSCC after chemoradiotherapy, two underwent abdominoperineal resection (APR), and one underwent ultralow anterior resection (uLAR)/total intersphincteric resection (ISR), surviving 56–76 months without recurrence. Of the four ARMM patients, APR and uLAR/total ISR were conducted in two patients, respectively, with variable survival outcomes. All seven patients with ARNET were treated with uLAR/ISR and LAR, surviving for 5–106 months to date.

Conclusions

Because most anorectal tumors are confined to the dermal and submucosal layers, robotic anorectal function preserving ISR is expected to achieve R0 resection.

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