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    Where to Seek Treatment

    Contributed by:
    SingHealth Duke-NUS Breast Centre


    Fibroadenoma is the most common tumour of the breast. It occurs in 25 percent of asymptomatic women, usually with a peak incidence in early reproductive life between the ages of 15 and 35.

    It is conventionally regarded as a benign tumour of the breast, and is thought to represent a harmless overgrowth of breast tissue. It is hormone-dependent and may enlarge during pregnancy, and involutes (shrinks) with the rest of the breast after menopause.


    Fibroadenoma has no known risk factors and is thought to be caused by female hormones.


    Fibroadenoma often presents as a painless, highly mobile, firm nodule within the breast.

    They may also be detected upon routine breast imaging i.e. mammography or ultrasound examination.


    Clinical breast examination often reveals the characteristic ‘breast mouse’ which is a nodule that is very mobile within the breast. Mammograms and breast ultrasound are often used depending on the risks, and diagnosis can be confirmed by core needle biopsy or excision biopsy.


    A fibroadenoma may be monitored for long-term stability or they may be removed by vacuum-assisted needle biopsy (VAB) or surgery.

    It may be difficult to differentiate a large fibroadenoma from the phyllodes tumour, another type of breast tumour, based on ultrasound or even core needle biopsy. If the latter is suspected, surgical excision with a margin to completely remove the tumour is recommended.

    Cancer Risk
    Simple fibroadenomas do not increase the risk of breast cancer.

    Where to Seek Treatment

    Specialist services available at the SingHealth Duke-NUS Breast Centre located at:

    National Cancer Centre Singapore Tel: 6436 8088
    Singapore General Hospital Tel: 6321 4377
    Changi General Hospital Tel: 6850 3333
    Sengkang General Hospital Tel : 6930 6000
    KK Women's and Children's Hospital Tel: 6294 4050

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