Prostate Cancer - Definition

Prostate cancer is a disease in which the cells of the prostate become abnormal. They start to grow uncontrollably, forming tumors. A tumor is a mass or lump of tissue made of abnormal cells. Tumors may be malignant or benign. A malignant tumor can spread to other parts of the body. Malignant tumors are cancerous. Benign tumors cannot spread to other parts of the body.

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