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Is minimally invasive surgery for large gastric GIST actually safe? A comparative analysis of short- and long-term outcomes

  • 2021 SAGES Oral
  • Published:
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Abstract

Introduction

While minimally invasive surgery (MIS) is frequently utilized to remove small gastric gastrointestinal stromal tumors (GIST), MIS surgery for tumors ≥ 5 cm is currently not endorsed by national guidelines as standard of care due to concerns of safety and inferior oncologic outcomes. Hence this study investigates the perioperative and long-term outcomes of MIS for T3 gastric GIST measuring 5–10 cm.

Methods

The National Cancer Database (NCDB) 2017 was queried for gastric GIST measuring 5–10 cm or T3 category. Inclusion criteria were known: stage, size, comorbidities, grade, lymphovascular invasion, type of surgery, approach, conversion info, margin status, mitotic rate, neoadjuvant and adjuvant treatment, hospital stay, readmission, 30- and 90-day mortality, complete follow-up, type of institution, and hospital gastric surgery case volume. Binary logistic regression, linear regression models, and Kaplan–Meier survival analysis were used.

Results

In 3765 patients, mean tumor size was 67.3 mm; 26.3% MIS; and 73.8% open. Median hospital stay was shorter for MIS (4.77 vs 7.04 days, p < 0.001). There was no significant difference in incidence of R1 margins [2.9% MIS vs. 3.1% open (p = 0.143)], unplanned readmission [2.9% MIS and 4.1% open (OR 0.474 p = 0.025)], 30-day mortality [0.5% MIS vs 1.2% open (OR 0.325, p = 0.031)], and 90-day mortality [0.9% MIS vs 2.1% open (OR 0.478 p = 0.036)]. Cox regression models for OS showed no difference in survival (p = 0.137, HR 0.808).

Conclusion

This analysis provides substantial evidence that MIS for gastric GIST ≥ 5–10 cm may not only offer improved postoperative morbidity but also oncologic safety. Moreover, as both approaches lead to similar long-term survival, national guidelines may need to incorporate this new information.

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This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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Correspondence to Claudius Conrad.

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Claudius Conrad is a consultant for Fuji, Integra, Immunitas, Stryker, and Olympus. Omid Salehi, Eduardo A. Vega, Onur C. Kutlu, Andrew B. Crocker, Sebastian Mellado, Mu Li, and Olga Kozyreva have no conflicts of interest to disclose.

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Crocker, A.B., Vega, E.A., Kutlu, O.C. et al. Is minimally invasive surgery for large gastric GIST actually safe? A comparative analysis of short- and long-term outcomes. Surg Endosc 36, 6975–6983 (2022). https://doi.org/10.1007/s00464-022-09066-4

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