Breast cancer is a type of cancer that begins in the cells of the breast. It can occur in both men and women, but it is much more common in women. Symptoms may include a lump in the breast, changes in the size, shape, or appearance of the breast, nipple discharge, or changes in the skin of the breast or nipple. Risk factors for breast cancer include age, family history, certain genetic changes, hormone levels, and lifestyle factors such as alcohol consumption and obesity. Treatment options for breast cancer depend on factors such as the type and stage of cancer but may include surgery, radiation therapy, chemotherapy, hormone therapy, targeted therapy, or a combination of these approaches. Early detection through regular breast exams and mammograms can improve the chances of successful treatment and recovery.

英語での「breast cancer」の定義と意味

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