Examlex
The special operator is used to check whether an attribute value is null.
Distant Metastasis
The spread of cancer cells from the original tumor site to distant organs or tissues in the body, indicating an advanced stage of cancer.
Primary Tumor
The original tumor where cancer first developed in the body.
Benzene
A colorless, volatile liquid hydrocarbon with a sweet odor, known to be carcinogenic, widely used as a precursor in the production of drugs, plastics, and dyes.
Chemical Carcinogen
A substance or agent that is known to cause cancer by altering the DNA within cells after exposure.
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