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Background . Gastric cancer is discovered even after successful eradication of  H. pylori . We investigated clinic pathological features of early gastric cancers after  H. pylori  eradication.  Methods . 51 early gastric cancers (EGCs) from 44 patients diagnosed after successful  H. pylori  eradication were included as eradication group. The clinic-pathological features were compared with that of 131 EGCs from 120 patients who did not have a history of  H. pylori  eradication (control group).  Results . Compared with control group, clinic-pathological features of eradication group were characterized as depressed ( p  < 0.0001), reddish ( p  = 0.0001), and smaller ( p  = 0.0095) lesions, which was also confirmed in the comparison of six metachronous lesions diagnosed after initial ESD and subsequent successful  H. pylori  eradication. Prevalence of both SM2 (submucosal invasion greater than 500  μ m) and unexpected SM2 cases tended to be higher in eradication group ( p  = 0.077, 0.0867, resp.). Prevalence of inconclusive diagnosis of gastric cancer during pretreatment biopsy was also higher in the same group (26.0% versus 1.6%,  p  < 0.0001).  Conclusions . Informative clinic pathological features of EGC after  H. pylori  eradication are depressed, reddish appearances, which should be treated as a caution because histological diagnosis of cancerous tissue is sometimes difficult by endoscopic biopsy.

Distinct Clinic-Pathological Features of Early Differentiated-Type Gastric Cancers afterHelicobacter pyloriEradication