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Her2+ gastric carcinoma
Magnification rule: 2,5-5X easy to see: 3+
Institute of Pathology | Alexander Quaas
Gastrointestinal Cancer Group Cologne (GCGC)
Positivity: baso-lateral or circumferential staining
Highly heterogenous distribution
Use other staining protocols: breast/gastric
Magnification rule: 20x : 2+ - (F) ISH and 1+ is negative