User:Mr. Ibrahem/Fibroadenoma

Fibroadenomas, also known as breast mice, are a type of non-serious breast tumour. They often feel round, firm, and are easy to move within the breast. They are typically up to 3 cm in size and are not painful. In about 70% of cases they occur singularly. They are not associated with breast cancer; though may result in anxiety or unequal breast size.

The cause is unknown. They may become more noticeable during pregnancy or hormone replacement therapy and shrink following menopause. They contain a mixture of connective and glandular tissue. Diagnosis may be supported by examination, ultrasound, mammography, and needle biopsy. It involves ruling out other types of breast lumps including breast cancer and phyllodes tumors.

If there are no symptoms, no treatment beyond reassurance and follow-up is required. In cases that are bothersome, removal by surgery or biopsy is an option. Other techniques that are being looked at include cryoablation and high-intensity focused ultrasound (HIFU). Fibroadenomas affect about 25% of women. They most often begin between the age of 15 and 35 years. The name breast mice refers to their high mobility within the breast.