ERBB2 and adenocarcinoma: Other tissue types were 0%, there were differences (P <.05); The positive rate of HER2 in well-differentiated adenocarcinoma was 10.84%, in moderately differentiated adenocarcinoma 16.44%, and in poorly differentiated adenocarcinoma 8.25%, with a difference between moderately and poorly differentiated adenocarcinoma (P <.05).