Tumor growth

Tumor growth is not a specific molecule, receptor, or defined therapeutic target. Instead, it refers to the general process by which tumor cells proliferate and expand within tissue. Tumor growth can be driven by numerous molecular pathways and factors—including kinases (such as RET, MAP2K1, ALK), metabolic enzymes, transcription factors (e.g., JUNB), and others—that collectively promote cell division, survival, invasion, and metastasis[1]. The term "tumor growth" encompasses a wide range of biological processes rather than identifying a single actionable protein or gene product. As such, it cannot be classified under standard molecular target categories like "receptor," "enzyme," or "transcription factor." For structured data extraction or drug discovery purposes, more precise targets (e.g., specific kinases or receptors involved in tumor proliferation) should be identified instead[1][4][5]. A valid therapeutic target must refer to a well-defined molecule—such as an enzyme (e.g., PI3K), receptor (e.g., EGFR), transporter—or another discrete entity that can be modulated by drugs. "Tumor growth" describes an outcome of many possible pathways but does not itself constitute such a target[4][5].