Table 2 Differences between HER2 evaluation in tumors of the upper gastrointestinal tract and breast cancer
Tumors of the upper gastrointestinal tract | Breast cancer | |
|---|---|---|
Threshold | ≥ 5 positive tumor cells of biopsies; ≥ 10% surgical specimen | ≥ 10% positive tumor cells |
Expression pattern | (baso)-lateral | circular |