Fibroadenoma A fibroadenoma is the most common solid nodule or lump found in the breast. It is not a cancer and will not turn into cancer. It is composed of normal elements found in the breast: tissue (FIBROUS) and glandular (ADENOMA). It is not uncommon to have more than one fibroadenoma.
Most fibroadenomas form in the breast while a woman is in her 20s or 30s, sometimes in her 40s. Occasionally, a fibroadenoma can enlarge slightly from year to year under stimulation from a woman's own hormones or from hormone replacement medicine. A fibroadenoma will not disappear by itself and is not known to be related to any particular diet or medical condition.
Currently, there are many approaches to dealing with a fibroadenoma. A large fibroadenoma, which can be felt in a young patient, is generally removed with surgery since it will only get larger, not smaller. A fibroadenoma that has been stable for 2-3 years and cannot be felt generally needs no particular treatment.