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- stomach neoplasms
- metachronous second primary neoplasms
- endoscopic mucosal resection
- standardised incidence ratio
The development of gastric epithelial neoplasia is closely linked to precursor conditions in the background mucosa.1–3 Recently, endoscopic mucosal resection (EMR) has become widely used for the treatment of gastric neoplasia,4 resulting in almost complete conservation of the patient’s stomach. To determine the risk of a second cancer in the stomach that once gave rise to epithelial neoplasia, we conducted a long term retrospective cohort study of 255 patients with primary gastric epithelial neoplasia who underwent curative resection by EMR between 1983 and 2002 at our hospital.
Characteristics of the subjects at the initial treatment are shown in table 1. Synchronous multiple neoplasias were confirmed in 19 (7.5 %) of the 255 subjects; 56 patients had adenomas and 199 had cancer. In the eight patients with both gastric cancer and adenoma, cancer was taken as the representative histology. In this study, we defined lesions classified as category 3 in the Vienna classification5 as “adenoma” and categories 4 and 5 as “cancer”.
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