Diagnostic accuracy of T stage of gastric cancer from the view point of application of laparoscopic proximal gastrectomy

Kouzu,Keita; Tsujimoto,Hironori; Hiraki,Shuichi; Nomura,Shinsuke; Yamamoto,Junji; Ueno,Hideki

doi:10.3892/mco.2018.1616

Diagnostic accuracy of T stage of gastric cancer from the view point of application of laparoscopic proximal gastrectomy

Authors:
- Keita Kouzu
- Hironori Tsujimoto
- Shuichi Hiraki
- Shinsuke Nomura
- Junji Yamamoto
- Hideki Ueno
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Affiliations: Department of Surgery, National Defense Medical College, Tokorozawa 359‑8513, Japan
Published online on: April 24, 2018 https://doi.org/10.3892/mco.2018.1616
Pages: 773-778

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Abstract

The preoperative diagnosis of T stage is important in selecting limited treatments, such as laparoscopic proximal gastrectomy (LPG), which lacks the ability to palpate the tumor. Therefore, the present study examined the accuracy of preoperative diagnosis of the depth of tumor invasion in early gastric cancer from the view point of the indication for LPG. A total of 193 patients with cT1 gastric cancer underwent LPG with gastrointestinal endoscopic examinations and a series of upper gastrointestinal radiographs. The patients with pT1 were classified into the correctly diagnosed group (163 patients, 84.5%), and those with pT2 or deeper were classified into the underestimated group (30 patients, 15.5%). Factors that were associated with underestimation of tumor depth were analyzed. Tumor size in the underestimated group was significantly larger; the lesions were more frequently located in the upper third of the stomach and were more histologically diffuse, scirrhous, with infiltrative growth, and more frequent lymphatic and venous invasion. For upper third lesions, in univariate analysis, histology (diffuse type) was associated with underestimation of tumor depth. Multivariate analysis found that tumor size (≥20 mm) and histology (diffuse type) were independently associated with underestimation of tumor depth. gastric cancer in the upper third of the stomach with diffuse type histology and >20 mm needs particular attention when considering the application of LPG.

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