What does tumorigenicity mean?
Tumorigenicity is the property of being capable of causing tumors. The term is used primarily in biomedical research to describe the tumor-forming capacity of chemical substances, biological agents, genetic changes, or experimental cell lines. It is often expressed as high or low and may be evaluated in laboratory models, long-term animal studies, or other experimental systems. Tumorigenicity is broader than carcinogenicity because a tumor need not be malignant: an agent can have tumorigenicity while producing only benign growths. In practice, the term often conveys a measured risk or tendency rather than certainty that tumors will develop. Its clinical and regulatory significance depends on the agent involved, the dose and duration of exposure, and the biological context in which tumor formation occurs. Understanding the distinction is important in interpreting safety assessments and experimental results.
nounThe capacity or tendency of an agent, cell line, or biological change to induce tumor formation. It does not necessarily imply that the resulting tumor is malignant.
- The capacity or tendency to cause tumor formation.
"The researchers found that the edited cells had markedly reduced tumorigenicity in xenograft models."
"The compound's tumorigenicity was evaluated in laboratory animals."
"The researchers reported that loss of the tumor-suppressor gene increased tumorigenicity in the cell model."
Rare; tumorigenicity is normally treated as an uncountable noun.
"The study compared the tumorigenicities of the two cell lines."
Something can be tumorigenic without being carcinogenic: it may produce a benign tumor without causing malignant cancer.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does tumorigenicity come from?
The word is formed from tumor, a term for a swelling or mass that entered English through Latin from Greek, together with the combining form -genic, associated with Greek roots meaning “producing,” and the suffix -ity, which forms a noun denoting a quality or condition. Together, these elements express the quality or capacity of producing tumors. The related scientific term oncogenesis similarly combines a Greek term for a mass or swelling with a Greek root meaning “production.”
How tumorigenicity is actually used
This is a formal scientific and medical term. It generally denotes a capacity or measurable propensity rather than a single instance of tumor formation, and it is commonly qualified as high, low, increased, or reduced.
Easily confused with tumorigenicity
Tumorigenicity refers to the capacity to induce tumors, including benign ones, whereas carcinogenicity specifically refers to the capacity to cause malignant cancer.