title: The assessment of the oncological safety margin of insufficient lymph node dissection in pT2 (pm) gastric cancer.
abstract: OBJECTIVE
  To identify the effect of insufficient lymph node dissection (LND) on the survival of patients with pT2 gastric cancer.
  
  
  METHODS
  A total of 340 patients (120 patients with insufficient LND and others with D2 LND) who underwent gastrectomy for pT2 gastric cancer between January 2008 and December 2010 were included.
  
  
  RESULTS
  The incidence of preoperatively diagnosed early gastric cancer was higher and there were fewer metastatic lymph nodes (LNs) in the insufficient LND group than the D2 group, but there was no survival difference between two groups (p=0.365). Among the 89 patients with metastatic LNs after D2 LND, 13 patients (14.6%) had metastatic LNs at selected N2 stations (#10, 11, or 12a), but none of these patients were in the pN1 category. One patient had five metastatic LNs at station #11p with no metastatic LNs at any other stations. The number of metastatic LNs was identified as the only risk factor for LN metastasis at selected N2 stations by logistic regression.
  
  
  CONCLUSIONS
  If a patient has pN0 or pN1 category after insufficient LND for pT2 gastric cancer, the surgery can be regarded as secure. However, for patients with pN2 or pN3 category, more careful examination is required.
authors: Department of Surgery, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-752, Korea. sunghoonn@yuhs.ac.
authors: Yoon Young
authors: YY
authors: Choi
authors: Ji Yeong
authors: JY
authors: An
authors: In
authors: I
authors: Cho
authors: In Gyu
authors: IG
authors: Kwon
authors: Dae Ryong
authors: DR
authors: Kang
authors: Woo Jin
authors: WJ
authors: Hyung
authors: Sung Hoon
authors: SH
authors: Noh
mesh_terms: D000368:Aged; D005260:Female; D005743:Gastrectomy; D006801:Humans; D008197:Lymph Node Excision / Q000379:methods*; D008297:Male; D008875:Middle Aged; D013274:Stomach Neoplasms / Q000175:diagnosis* / Q000601:surgery*
keywords: Gastric cancer; gastrectomy; lymph node dissection; survival