Salvage treatment may be warranted after incomplete resection of rectal neuroendocrine tumors due to significant residual disease concerns.

• Incomplete resection rates: 73.1% for cold snare polypectomy; 29.8% for conventional EMR; 14.7% for endoscopic submucosal dissection.
• Residual tumor rate with salvage treatment is 25% (CI: 12%–40%).

Individualized clinical decisions are crucial given the uncertainty in recurrence prevention.

• Recurrence rates favor salvage treatment, showing a crude rate of 0.96%.