title: Impact of tumor infiltration pattern into the surrounding tissue on prognosis of the subserosal gastric cancer (pT2b).
abstract: BACKGROUND
  The aim of this study was to clarify the impact of infiltration pattern on prognosis in patients with gastric carcinoma invading subserosa.
  
  
  METHODS
  Clinicopathologic findings in patients with ssgamma pattern (n = 144) were compared with those in patients with ssalpha/ssbeta cancers (n = 222). Prognostic factors of pT2b patients were analyzed by univariate and multivariate analysis.
  
  
  RESULTS
  Compared with the ssalpha/beta group, ssgamma gastric cancer exhibited more frequent undifferentiated histology, disseminated lymph node metastasis and perineural invasion. Frequency of postoperative peritoneal recurrence was significantly higher in ssgamma gastric cancer (P < 0.05). The 5-year survival rate for patients with ssgamma gastric cancer was significantly lower compared with ssalpha/beta group (63.2% vs. 74.8%, respectively; P < 0.05). Lymph node metastasis, vein invasion and infiltrative pattern (ssgamma) were significant independent prognostic factors affecting survival in pT2b patients.
  
  
  CONCLUSIONS
  In patients with gastric cancer invading the subserosa, infiltrative type growth pattern is closely related to carcinomatosis and poorer prognosis.
authors.affiliation: Department of Surgery, Division of Gastrointestinal Surgery, The Catholic University of Korea, College of Medicine, Seoul, Seoul St. Mary's Hospital. 505 Banpo-dong, Seocho-gu, Seoul 137-701 Republic of Korea.
authors.forename: K Y
authors.initials: KY
authors.lastname: Song
authors.forename: H
authors.initials: H
authors.lastname: Hur
authors.forename: C K
authors.initials: CK
authors.lastname: Jung
authors.forename: E S
authors.initials: ES
authors.lastname: Jung
authors.forename: S N
authors.initials: SN
authors.lastname: Kim
authors.forename: H M
authors.initials: HM
authors.lastname: Jeon
authors.forename: C H
authors.initials: CH
authors.lastname: Park
mesh_terms: D005260:Female; D005753:Gastric Mucosa / Q000473:pathology; D006801:Humans; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009361:Neoplasm Invasiveness; D009367:Neoplasm Staging; D010534:Peritoneal Neoplasms / Q000473:pathology; D011237:Predictive Value of Tests; D011379:Prognosis; D013274:Stomach Neoplasms / Q000473:pathology*; D015996:Survival Rate