Fibroadenoma
What Is a Fibroadenoma?
A fibroadenoma is a common benign (non-cancerous) breast lump, most frequently found in women between the ages of 15 and 40. It is formed by an overgrowth of normal breast tissue within a single lobule.
Fibroadenomas typically feel smooth, firm, and mobile under the skin — sometimes referred to as a “breast mouse” because they can move easily when touched.
They can vary in size from a few millimetres to several centimetres and may enlarge temporarily due to hormonal changes, such as during pregnancy or while using hormonal medications.
Most fibroadenomas are harmless, remain stable over time, and may even shrink after menopause.
Common Causes and Risk Factors
The exact cause of fibroadenoma formation is not fully understood, but several factors are associated:
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Hormonal influence, especially oestrogen stimulation
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Reproductive age (most common between 15 and 40 years)
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Pregnancy or hormonal therapy, which can enlarge existing fibroadenomas
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Family history, though most occur sporadically
Fibroadenomas are not cancerous and do not increase the overall risk of developing breast cancer.
Symptoms and When to Seek Advice
Most fibroadenomas are painless, round, firm, and mobile lumps found incidentally during a self-exam or imaging.
Seek medical assessment if you notice:
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A new or enlarging lump
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Pain or discomfort in the lump area
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Change in breast shape or visible asymmetry
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Associated nipple discharge or skin changes
Early evaluation helps confirm the diagnosis and rule out other causes of breast lumps.
Diagnosis and Assessment
At Breast & Wellness, diagnosis follows the triple assessment approach, ensuring accuracy and confidence:
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Clinical examination by a breast specialist
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Imaging – ultrasound (most useful in younger women) and/or mammogram (in women over 40)
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Core needle biopsy to confirm the diagnosis under microscopy
This combination provides near-100% diagnostic certainty and helps determine whether monitoring or surgical removal is appropriate.
Treatment Options
In most cases, no treatment is required once the diagnosis is confirmed. Management depends on the lump’s size, symptoms, and patient preference:
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Observation: Small, stable fibroadenomas can be safely monitored with periodic imaging and clinical review.
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Surgical removal: Recommended if the fibroadenoma is large, rapidly growing, painful, or causes cosmetic concern.
The choice of treatment is tailored to individual circumstances, balancing safety, comfort, and cosmetic outcome.
Prognosis and Follow-Up
Fibroadenomas are benign and have an excellent prognosis.
Once removed, recurrence in the same site is rare, although new fibroadenomas can develop in other areas of the breast.
Regular breast self-checks and routine imaging remain important to maintain overall breast health.
Key Points
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Common benign breast lump seen in younger women
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Usually painless, smooth, and mobile
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Diagnosed with triple assessment (exam, imaging, biopsy)
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Most cases require no treatment, only monitoring
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Minimally invasive removal available at Breast & Wellness if indicated
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