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A precancerous condition is a condition, tumor or lesion involving abnormal cells which are associated with an increased risk of developing into cancer. [1] [2] [3] Clinically, precancerous conditions encompass a variety of abnormal tissues with an increased risk of developing into cancer.
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It is a precancerous lesion, a tissue alteration in which cancer is more likely to develop. [4] The chance of cancer formation depends on the type, with between 3–15% of localized leukoplakia and 70–100% of proliferative leukoplakia developing into squamous cell carcinoma .
A benign tumor is a mass of cells that does not invade neighboring tissue or metastasize (spread throughout the body). Compared to malignant (cancerous) tumors, benign tumors generally have a slower growth rate.
Pre-cancer of the breast is a precancerous condition of the breast. It may eventually develop into breast cancer. There are two types: Ductal carcinoma in situ, the most common type of breast pre-cancer; Lobular carcinoma in situ, pre-cancer of the breast that is outside the milk ducts
The Cancer Genome Anatomy Project (CGAP), created by the National Cancer Institute (NCI) in 1997 and introduced by Al Gore, is an online database on normal, pre-cancerous and cancerous genomes. It also provides tools for viewing and analysis of the data, allowing for identification of genes involved in various aspects of tumor progression.
In the United States cancer affects about 1 in 285 children. [221] Rates of childhood cancer increased by 0.6% per year between 1975 and 2002 in the United States [222] and by 1.1% per year between 1978 and 1997 in Europe. [220] Death from childhood cancer decreased by half between 1975 and 2010 in the United States. [221]
Cancer cells are cells that divide continually, forming solid tumors or flooding the blood or lymph with abnormal cells.Cell division is a normal process used by the body for growth and repair.