Immunohistochemical expression of HER-2/NEU-CERBB-2 in patients with adenocarcinoma of the stomach.

Objectives: To determine the prevalence of Her-2/Neu-cerbb-2 in the gastric mucosa of patients with gastric adenocarcinoma in a brazilian patient group.

Methods: The immunohistochemical expression of Her-2/Neu was studied in 37 formalin-fixed paraffin-embedded tissue sections.

Results: The immunohistochemical reaction produced by the anti-HER-2/Neu antibody was positive in two cases (5.