Breast cancer cell. Coloured scanning electron micrograph (SEM) of a single breast cancer cell, showing its uneven surface and cytoplasmic projections. Clumps of cancerous (malignant) cells form tumours, which possess the ability to invade and destroy surrounding tissues and travel to distant parts of the body to seed secondary tumours. Malignant cells proliferate and grow in a chaotic manner, with defective cell division retained within each new generation of cells. Variations also occur in size and structure of the cancer cell from its original cell type. Breast cancer is the most common cause of cancer in women. Magnification: unknown.
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