Abstract:
BACKGROUND:HER2 positivity is reported to be <20% in gastric cancer. Clinicopathological characteristics will be helpful to understand the biological features of HER2-positive gastric cancer. METHODS:A total of 813 gastric cancer patients who underwent HER2 testing between January 2005 and December 2010 were included in this study. RESULTS:Ninety-five (11.7%) patients had HER2-positive gastric cancer. Elevated serum carcinoembryonic antigen (CEA) concentration [odds ratio (OR), 5.629; p < 0.001] and differentiated histology (OR, 3.717; p = 0.002) were significant predictive factors for HER2 positivity in localized disease. For recurrent or metastatic disease, elevated serum CEA concentration (OR, 2.545; p < 0.001), differentiated histology (OR, 3.299; p < 0.001), pulmonary metastasis (OR, 3.321; p = 0.001), and distant lymph node metastasis (OR, 2.286; p = 0.002) were significant predictive factors. Median disease-free survival (DFS) was shorter in HER2-positive patients than in others, especially in stage I or II disease (24.7 vs. 49.2 months; p < 0.001). Among HER2-negative patients with stage II diseases, patients who received adjuvant chemotherapy had longer DFS than others (42.2 vs. 30.7 months; p = 0.025). CONCLUSIONS:Clinicopathological factors may be useful in predicting the HER2 positivity of gastric cancer. Further studies are needed to understand the molecular basis of HER2-positive gastric cancer.
journal_name
Oncologyjournal_title
Oncologyauthors
Park JS,Rha SY,Chung HC,Jung M,Kim KH,Jun HJ,Kim H,An JY,Kim HI,Cheong JH,Hyung WJ,Noh SH,Kim HSdoi
10.1159/000368555subject
Has Abstractpub_date
2015-01-01 00:00:00pages
147-56issue
3eissn
0030-2414issn
1423-0232pii
000368555journal_volume
88pub_type
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