Background and aims
Non-ampullary duodenal laterally spreading tumors (NAD-LSTs) mimic the morphological features and natural history of colorectal LSTs, even achieving a large size but lacking invasive behavior; thus, they are suited for endoscopic resection (ER). At present, the endoscopic therapeutic approach in NAD-LSTs has not been clearly established. The aim of this study was to evaluate the efficacy and safety of ER for NAD-LSTs and to evaluate the risk factors for delayed perforation after ER of NAD-LSTs.
Patients and methods
A total of 54 patients with 54 NAD-LSTs treated with ER at the Chinese PLA General Hospital between January 2007 and January 2018 were retrospectively analyzed. Data on patient demographic, clinicopathological characteristics of the lesions, outcomes of ER, and results of follow-up endoscopies were collected.
The mean (SD) lesion size was 26.9 mm (8.5). Endoscopic mucosal resection (EMR) was performed in 21 lesions, and endoscopic submucosal dissection (ESD) was performed in 33 lesions. R0 resection was achieved in 93.9% of the ESD group and 38.1% of the EMR group (p = 0.000). Delayed bleeding was noted in two patients. Delayed perforation was identified in four patients. The incidence of delayed perforation showed a significant association with post-ampullary tumor location (p = 0.030). Follow-up endoscopy was performed in all cases with a mean (SD) period of 22.1 months (8.2), and local recurrence was identified in four cases after piecemeal EMR.
ER of NAD-LSTs is a feasible and less invasive treatment. However, ER of NAD-LSTs is associated with serious adverse events such as delayed perforation, especially in patients with lesions located distal to Vater’s ampulla.
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Jiale Zou, Ningli Chai, Enqiang Linghu, Yaqi Zhai, Zhenjuan Li, Chen Du, and Longsong Li have no conflicts of interest or financial ties to disclose.
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Zou, J., Chai, N., Linghu, E. et al. Clinical outcomes of endoscopic resection for non-ampullary duodenal laterally spreading tumors. Surg Endosc 33, 4048–4056 (2019). https://doi.org/10.1007/s00464-019-06698-x
- Endoscopic resection
- Non-ampullary duodenal laterally spreading tumors
- Delayed perforation