NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,922 terms related to cancer and medicine.

Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.

extragonadal germ cell tumor
(EK-struh-goh-NA-dul jerm sel TOO-mer)
A rare cancer that develops in germ cells that are found in areas of the body other than the ovary or testicle (such as the brain, chest, abdomen, or tailbone). Germ cells are reproductive cells that develop into sperm in males and eggs in females.