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  1. Dictionary
    tumour
    /ˈtjuːmə/

    noun

    • 1. a swelling of a part of the body, generally without inflammation, caused by an abnormal growth of tissue, whether benign or malignant: "she underwent six months of chemotherapy to try to shrink the tumour"

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  3. my.clevelandclinic.org › health › diseasesTumor: What Is It, Types, Symptoms, Treatment & Prevention

    Oct 5, 2021 · A tumor is a mass of abnormal cells that can be benign (not cancerous) or malignant (cancerous). Learn about the causes, diagnosis and treatment of different types of tumors, and how to prevent some of them.

  4. www.verywellhealth.com › what-is-a-tumor-5093177What Is a Tumor? - Verywell Health

    Jan 24, 2021 · A tumor is an abnormal mass of tissue that can be benign (not cancerous) or malignant (cancerous). Learn about the causes, types, symptoms, diagnosis, and treatment of tumors.

  5. www.medicalnewstoday.com › articles › 249141Tumors: Benign, premalignant, and malignant - Medical News Today

    Nov 16, 2023 · The National Cancer Institute defines a tumor as “an abnormal mass of tissue that results when cells divide more than they should or do not die when they should.” Tumors can vary in size...

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  7. www.britannica.com › science › tumorTumour | Causes, Diagnosis & Treatment | Britannica

    5 days ago · Tumour, a mass of abnormal tissue that arises without obvious cause from preexisting body cells, has no purposeful function, and is characterized by a tendency to independent and unrestrained growth. Tumours are quite different from inflammatory or other swellings because the cells in tumours are.

    • The Editors of Encyclopaedia Britannica

  8. dictionary.cambridge.org › dictionary › englishTUMOUR | English meaning - Cambridge Dictionary

    TUMOUR definition: a mass of diseased cells that might become a lump or cause illness: . Learn more.

  9. www.cancer.gov › about-cancer › understandingWhat Is Cancer? - NCI - National Cancer Institute

    Oct 11, 2021 · Cancer is a disease in which some of the body’s cells grow uncontrollably and spread to other parts of the body. Learn about the definition, causes, types, and treatments of cancer from the National Cancer Institute.

  10. www.verywellhealth.com › what-does-malignant-andMalignant vs. Benign Tumors: How They Differ - Verywell Health

    May 2, 2023 · A tumor is an abnormal mass or growth of tissue that serves no specific purpose. It can develop when cells grow and divide too quickly. Tumors can be located anywhere in the body. They grow and behave differently depending on whether they are benign (noncancerous) or malignant (cancerous). Benign (Noncancerous) Tumors.