Understanding a 2 cm fibroadenoma

Size alone does not decide whether it needs treatment. Your age, examination, imaging appearance, any change over time, symptoms and level of diagnostic certainty guide whether it is monitored, sampled or removed.

A fibroadenoma is a solid growth made from breast glandular and supporting tissue. It often feels smooth, firm and mobile, although touch cannot establish the diagnosis. Breast ultrasound can show its shape, borders and internal appearance.

A clinician checks that the examination and imaging findings agree. If they do not match, the lump has concerning features, or certainty is needed, a needle biopsy may be recommended to examine tissue.

Attend the recommended breast-clinic review and bring earlier scans if the lump was assessed elsewhere. Follow-up imaging may be used to confirm that its appearance remains stable. Note a clear change in the lump rather than checking it repeatedly, which can make the breast sore.

Removal is not automatically required for a confirmed fibroadenoma. Excision may be discussed if it enlarges, causes persistent discomfort, distorts the breast, creates significant concern or has findings that require a complete tissue diagnosis. Surgery can leave a scar and may alter the breast contour, so the expected benefit and trade-offs deserve discussion.

Arrange review if the lump grows, becomes fixed, feels distinctly different, or is joined by skin dimpling, nipple inversion, bloody nipple discharge or a new armpit lump. These changes do not establish a cause, but they need assessment rather than being attributed to a previous fibroadenoma diagnosis.

Seek prompt care for a hot, red, rapidly swollen breast with fever or feeling unwell, as infection may need treatment.

Ask whether the clinical examination and scan agree, whether biopsy is needed, what change should trigger an earlier review, how follow-up will be arranged, and what effect removal could have on scarring, sensation and breast shape.