Published online Apr 21, 2018. doi: 10.3748/wjg.v24.i15.1632
Peer-review started: February 11, 2018
First decision: March 9, 2018
Revised: March 16, 2018
Accepted: March 31, 2018
Article in press: March 30, 2018
Published online: April 21, 2018
To determine short- and long-term outcomes of endoscopic submucosal dissection (ESD) using the stag beetle (SB) knife, a scissor-shaped device.
Seventy consecutive patients with 96 early esophageal neoplasms, who underwent ESD using a SB knife at Kure Medical Center and Chugoku Cancer Center, Japan, between April 2010 and August 2016, were retrospectively evaluated. Clinicopathological characteristics of lesions and procedural adverse events were assessed. Therapeutic success was evaluated on the basis of en bloc, histologically complete, and curative or non-curative resection rates. Overall and tumor-specific survival, local or distant recurrence, and 3- and 5-year cumulative overall metachronous cancer rates were also assessed.
Eligible patients had dysplasia/intraepithelial neoplasia (22%) or early cancers (squamous cell carcinoma, 78%). The median procedural time was 60 min and on average, the lesions measured 24 mm in diameter, yielding 33-mm tissue defects. The en bloc resection rate was 100%, with 95% and 81% of dissections deemed histologically complete and curative, respectively. All procedures were completed without accidental incisions/perforations or delayed bleeding. During follow-up (mean, 35 ± 23 mo), no local recurrences or metastases were observed. The 3- and 5-year survival rates were 83% and 70%, respectively, with corresponding rates of 85% and 75% for curative resections and 74% and 49% for non-curative resections. The 3- and 5-year cumulative rates of metachronous cancer in the patients with curative resections were 14% and 26%, respectively.
ESD procedures using the SB knife are feasible, safe, and effective for treating early esophageal neoplasms, yielding favorable short- and long-term outcomes.
Core tip: Various devices designed for endoscopic submucosal dissection (ESD) are currently under investigation for their usefulness in the treatment of early esophageal neoplasms. This study aimed to evaluate the short- and long-term outcomes of ESD using the stag beetle (SB) knife, a scissor-shaped device. Seventy-four patients with 101 esophageal lesions underwent resection via SB-knife ESD. Rates of en bloc, histologically complete, and curative resections were 100%, 95%, and 81%, respectively. The 3- and 5-year survival rates were 83% and 70%, respectively. The SB knife allows safe and effective ESD of early esophageal neoplasms.