fibrocystic breast disease
Meaning of fibrocystic breast disease: The older name for ordinary cyclical breast lumpiness, kept in many records although the word disease is now considered inaccurate.
Definition of fibrocystic breast disease
Fibrocystic breast disease is the traditional name for benign lumpiness, tenderness and cysts in the breast that fluctuate with the menstrual cycle. The findings are a normal response of breast tissue to hormones rather than an illness, which is why most current references prefer the term fibrocystic changes. The name still appears widely in older notes, pathology reports and everyday speech.
Why did the name change?
A term becomes misleading when it labels something common and harmless as an illness. Studies of breast tissue found these features in a very large proportion of women examined, including many with no symptoms at all. Calling that a disease implies a condition needing treatment and can cause real anxiety, and it also carried an unearned suggestion of raised cancer risk. Reference works therefore shifted to the wording fibrocystic breast changes, or to the broader heading of benign breast conditions. The tissue findings themselves have not changed; only the label has.
What is found in the tissue?
| Component | What it is |
|---|---|
| Cysts | Ducts that have dilated and filled with fluid |
| Fibrosis | Extra fibrous tissue between the glands |
| Adenosis | An increase in the number of small gland units |
| Apocrine change | Cells lining a cyst taking on a different appearance |
Does it affect cancer risk?
For most of these findings, no. Cysts, fibrosis and simple adenosis carry no meaningful increase in risk. The picture changes only where a biopsy shows cells multiplying in an abnormal pattern, described as atypical hyperplasia, which is a separate finding that happens to occur in the same tissue. Distinguishing the two requires a tissue sample, since neither the symptoms nor the examination can separate them. This distinction is the practical reason the older blanket term caused difficulty: it grouped findings of quite different significance under one alarming word, among them changes with no bearing at all on breast cancer risk.
What does it mean on an old report?
Seen in a record, the phrase indicates benign breast tissue showing cysts and fibrous change. It says nothing about how much tissue was affected or whether atypical cells were present, both of which would be stated separately. Where a report from earlier years is being reviewed, the substance lies in the description of the tissue rather than in the heading applied to it.
Also known as
Used in a sentence
The previous biopsy report described fibrocystic breast disease without atypia.
Good to know
The term persists in older records but is regarded as a misnomer, and only the separate finding of atypical hyperplasia within such tissue carries an increase in breast cancer risk.