Endoscopic submucosal dissection and hybrid endoscopic submucosal dissection for stage 1 rectal neuroendocrine tumors

The technical complexity and potential for complications associated with endoscopic submucosal dissection (ESD) pose limitations on the widespread use of this procedure for stage 1 rectal neuroendocrine tumors (NETs), despite its high success rate in achieving complete resection (R0).

To examine the results of ESD and hybrid ESD, a simpler adaptation of the ESD technique, for stage 1 rectal NETs.

Seventy-nine patients with 84 lesions of clinical stage 1 rectal NETs who received treatment at Sun Yat-sen University Cancer Center from January 2010 to June 2021 were reviewed retrospectively.

Sixty-one lesions in 58 patients were treated with ESD, while 23 in 21 patients were treated with hybrid ESD. The 84 rectal NETs had a median diameter of 8 (5) mm (range, 3-20 mm), with the median lesion size 8 (5) mm for ESD and 8 (4) mm for hybrid ESD (P = 0.359). For ESD, the median duration of procedure was 46.00 (14.00) minutes, while for hybrid ESD, it was 32.00 (15.00) minutes (P < 0.001). Both the ESD and hybrid ESD groups had identical rates of en bloc resection (100.00% vs 100.00%, P = 1.000), R0 resection (86.89% vs 86.96%, P = 1.000), perforation (1.64% vs 0.00%, P = 1.000), and delayed bleeding (1.64% vs 4.35%, P = 0.475). After a median of 27.50 (30.00) months of observation, neither group had recurrence.

For endoscopic excision of stage 1 rectal NETs, both ESD and hybrid ESD were well tolerated and produced positive results, with similar efficacy and safety.