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  1. #1
    **Hair transplant cost** Female

    Join Date
    Jun 2017

    Default What is the difference between cancer and a tumor?

    Tumors may or may not be cancers. Cancers may represent as tumors.

    A tumor is an abnormal growth or mass of tissue in an organism. If the tumor stabilizes such that it does not effect bodily functions, it is normally classified as benign. If it does effect bodily functions, it is considered malignant. It may be considered cancerous if it meets the definition of a cancer. A cyst is often considered benign whereas a melanoma growth is considered malignant and cancerous.

    A cancer is a uncontrolled genetic mutation of normal cells that if left unchecked will threaten the life and well being of the organism that it is in. From the definitions of the National Cancer Institute, all cancers are tumors. An example of tumorous cancer is breast cancer.

    EDIT: This was revised because of Tristan Chenier'c comment below which reflected that my reference was incorrect.

    There may be a dispute whether or not leukemia is a tumor. It seems most sources consider it a tumor or are non-specific. However the NationalCancer Institute declares it not a tumor which was consistent with my original answer:

    "Not all tumors are cancerous; tumors can be benign or malignant.
    Benign tumors aren't cancerous. They can often be removed, and, in most cases, they do not come back. Cells in benign tumors do not spread to other parts of the body.
    Malignant tumors are cancerous. Cells in these tumors can invade nearby tissues and spread to other parts of the body. The spread of cancer from one part of the body to another is called metastasis.
    Some cancers do not form tumors. For example, leukemia is a cancer of the bone marrow and blood.

  2. #2
    **Alex hale** Male

    Join Date
    Apr 2018


    Tumors may be benign (not cancer), or malignant (cancer). Also called neoplasm. Cancer is a term for diseases in which abnormal cells divide without control and can invade nearby tissues. Cancer cells can also spread to other parts of the body through the blood and lymph systems.

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