NCI Dictionary of Cancer Terms

The NCI Dictionary of Cancer Terms features 8,371 terms related to cancer and medicine.

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tumor DNA sequencing
(TOO-mer ... SEE-kwen-sing)
A laboratory method used to learn the exact order (sequence) of the chemical building blocks that make up tumor DNA. Errors in the sequence of the building blocks can cause cancer cells to grow and spread. Knowing the DNA sequence of a person’s tumor may help plan treatment that targets the specific error in the tumor.