سرطان سینه

Breast cancer begins in breast tissue. Most of the tumors that develop in breast tissue are benign (not cancerous). Some breast tumors are cancerous, but have not yet spread to other parts of the body. This type of breast cancer is called "in situ," and it can almost always be cured with treatment. The most serious type of breast cancer is invasive, meaning that the cancerous tumors have spread to other parts of the body.

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