Indication

HER2-Positive Solid Tumor

A HER2-positive solid tumor refers to any non-hematologic malignancy across diverse organ systems—including the breast, gastrointestinal tract, biliary tract, lung, and gynecologic organs—characterized by the abnormal overexpression of the human epidermal growth factor receptor 2 protein or amplification of the *ERBB2* gene. Read more about HER2-Positive Solid Tumor

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About HER2-Positive Solid Tumor.

A HER2-positive solid tumor refers to any non-hematologic malignancy across diverse organ systems—including the breast, gastrointestinal tract, biliary tract, lung, and gynecologic organs—characterized by the abnormal overexpression of the human epidermal growth factor receptor 2 protein or amplification of the *ERBB2* gene.

In clinical practice and regulatory definitions, HER2 positivity is typically confirmed by high-level protein expression (immunohistochemistry [IHC] 3+) or gene amplification detected via in situ hybridization.

Pathophysiologically, the excessive density of this receptor tyrosine kinase triggers constitutive downstream intracellular signaling through the MAPK and PI3K/AKT pathways, resulting in uncontrolled cellular proliferation, survival, and heightened tumor aggressiveness.

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