title: Gastric cancer patients at high-risk of having synchronous cancer.
abstract: OBJECTIVE
  To identify patients with a high-risk of having a synchronous cancer among gastric cancer patients.
  
  
  METHODS
  We retrospectively analyzed the prospective gastric cancer database at the National Cancer Center, Korea from December 2000 to December 2004. The clinicopathological characteristics of patients with synchronous cancers and those of patients without synchronous cancers were compared. Multivariate analysis was performed to identify the risk factors for the presence of a synchronous cancer in gastric cancer patients.
  
  
  RESULTS
  111 of 3291 gastric cancer patients (3.4%) registered in the database had a synchronous cancer. Among these 111 patients, 109 had a single synchronous cancer and 2 patients had two synchronous cancers. The most common form of synchronous cancer was colorectal cancer (42 patients, 37.2%) followed by lung cancer (21 patients, 18.6%). Multivariate analyses revealed that elderly patients with differentiated early gastric cancer have a higher probability of a synchronous cancer.
  
  
  CONCLUSIONS
  Synchronous cancers in gastric cancer patients are not infrequent. The physicians should try to find synchronous cancers in gastric cancer patients, especially in the elderly with a differentiated early gastric cancer.
authors: Research Institute & Hospital, National Cancer Center, Goyang-si, Gyeonggi-do, Korea.
authors: Jun Ho
authors: JH
authors: Lee
authors: Ja Seong
authors: JS
authors: Bae
authors: Keun Won
authors: KW
authors: Ryu
authors: Jong Seok
authors: JS
authors: Lee
authors: Sook Ryun
authors: SR
authors: Park
authors: Chan Gyoo
authors: CG
authors: Kim
authors: Myoung Cheorl
authors: MC
authors: Kook
authors: Il Ju
authors: IJ
authors: Choi
authors: Young Woo
authors: YW
authors: Kim
authors: Jae-Gahb
authors: JG
authors: Park
authors: Jae-Moon
authors: JM
authors: Bae