A localized swelling in the breast is usually a lump in the breast.
No. All lumps in the breast do not occur due to cancer. Usually, lumps in young patients [15 to 25 yrs] are fibroadenomas. Lump in women after the age of 40yr should be treated with suspicion But exception does occur sometimes. Other lumps like cyst, abscess, mastitis or a phylloid tumour etc can also occur in women.
In young patients (<40yr) usually, sonography is done. It differentiates between solid & cystic lump very well.
Mammography is done after 40 yrs either for screening purpose or for diagnosis of breast cancer. It can easily detect changes in Breast cancer. Sonography combined with mammography is called sonomamography. It is done for more information & accurate diagnosis.
No. cancer does not spread by air, or water or food transmission neither by blood transmission. But generic transmission can happen.
It depends upon the stage & histopathological features of the breast cancer.