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Table 2 Intensity of EGFR and HER2 immunohistochemical stainings in intestinal adenocarcinomasa (N = 220)

From: EGFR gene amplification is relatively common and associates with outcome in intestinal adenocarcinoma of the stomach, gastro-oesophageal junction and distal oesophagus

IHC staining intensity EGFR, N (%)a HER2, N (%)b EGFR and HER2, N (%)c
0/1+ 148 (67.3) 189 (85.9) 131 (59.5)
2+/3+ 72 (32.7) 31 (14.1) 14 (6.4)
  1. IHC immunohistochemistry. 0, negative; 1+ low; 2+ moderate; 3+ strong
  2. aAccording to the most intense membranous or membranous + cytoplasmic staining
  3. bAccording to the most intense membranous staining
  4. cConcordant IHC staining intensity. In 75 tumours (34.1 %) IHC staining intensity was discordant