Bernard Fisher's trials establish breast-conserving surgery

Historical milestone — this page describes work dated 1985. It is not breaking news, and the surgical standards it describes have moved on since.

The question surgeons were asking

For most of the twentieth century, breast surgery followed one logic. Cut wider and you cut more disease. The Halsted radical mastectomy took the breast, the chest muscles under it, and the armpit lymph nodes in one block.

Bernard Fisher worked at the National Surgical Adjuvant Breast and Bowel Project in Pittsburgh. His group set out to test that logic rather than assume it. The method was randomization: patients were assigned to one operation or another by chance, so the groups compared are alike except for the surgery.

How the lumpectomy trial was built

The lumpectomy trial began in 1976. It enrolled women with stage I and stage II breast tumors of 4 cm or less.

Each woman was assigned at random to one of three operations:

• Total mastectomy, removing the whole breast
• Segmental mastectomy, now usually called lumpectomy, removing only enough tissue to leave clear edges
• Lumpectomy followed by radiation to the remaining breast

Everyone had an axillary dissection, meaning the armpit lymph nodes were removed and examined. Women whose nodes contained cancer also received chemotherapy.

What the results showed

The five-year report ran in the New England Journal of Medicine in 1985, drawing on 1,843 women. Lumpectomy, with or without radiation, gave survival no worse than taking the whole breast. That held for overall survival and for time lived free of the disease.

Radiation made a large difference to one thing. At five years, 92.3% of women who had radiation were still free of tumor in that breast, against 72.1% of those who did not. Among women with cancer in their nodes, all of whom got chemotherapy, the figures were 97.9% and 63.8%.

The twenty-year report came in 2002, with data on 1,851 women. It held. Cancer came back in the treated breast in 14.3% of women who had lumpectomy plus radiation, against 39.2% of those who had lumpectomy alone. Across the three groups there was no real difference in survival. Set against total mastectomy, the hazard ratio for death was 1.05 for lumpectomy alone and 0.97 for lumpectomy plus radiation. Both amount to no difference.

The authors noted one wrinkle. Radiation was tied to a small drop in deaths from breast cancer, partly offset by a rise in deaths from other causes.

The trial that came first

The lumpectomy trial rested on an earlier answer. A trial Fisher's group started in 1971 tested the Halsted radical mastectomy itself against less extensive surgery. It enrolled 1,079 women whose armpit nodes seemed clear on examination and 586 whose nodes did not.

At twenty-five years there was no real difference in survival between any of the groups. Removing more tissue had not bought more life. Our page on lumpectomy versus mastectomy covers how that choice is framed today.

Where the standard sits now

NCI's health-professional summary says every histological type of invasive breast cancer may be treated with breast-conserving surgery plus radiation. It also says survival is the same across the surgical options.

There are exceptions. Inflammatory breast cancer rules out breast conservation, whatever the tumor type. More than one tumor in the same breast, and a history of collagen vascular disease, are partial reasons against it.

The meaning of a clear edge has tightened. A consensus panel drew on 33 studies covering 28,162 patients. Positive margins — ink on the tumor when the pathologist looks at the removed tissue — doubled the risk of the cancer returning in that breast. Wider clear margins did not lower it further. So "no ink on tumor" became the standard. Our page on what surgical margins mean explains how that reads on a report.

Armpit surgery changed too. Sentinel lymph node biopsy samples the first node the breast drains into. It is now the standard staging step, in place of clearing the whole armpit.

When to get checked

None of this history changes what should prompt an appointment. See a clinician for any of these, and do not wait for a scheduled mammogram:

• A lump in the breast or armpit that persists past one menstrual cycle
• Dimpling, puckering, or thickening of the skin over the breast
• A nipple that newly turns inward, or crusting that will not clear
• Fluid from one nipple that appears on its own, particularly if bloody
• Redness, warmth, and swelling across one breast, which needs same-week assessment

What this does not mean

• These trials enrolled women whose tumors came out with tumor-free edges. The result does not mean every breast cancer can be treated with lumpectomy.
• Keeping the breast did not lengthen life. It matched mastectomy. Radiation sharply cut return of the cancer in that breast, without changing overall survival at twenty years.
• The trials were designed before hormone-receptor and HER2 testing shaped treatment, and before sentinel node biopsy existed.
• The survival figures come from an era of different chemotherapy, different radiation, and different imaging. They are history, not a forecast.
• This is a summary of published trials. It is not guidance about anyone's own operation.

Sources

• Fisher B, Bauer M, Margolese R, et al. Five-year results of a randomized clinical trial comparing total mastectomy and segmental mastectomy with or without radiation in the treatment of breast cancer. N Engl J Med 1985;312:665-73 — https://eutils.ncbi.nlm.nih.gov/entrez/eutils/efetch.fcgi?db=pubmed&id=3883167&retmode=xml
• Fisher B, Anderson S, Bryant J, et al. Twenty-year follow-up of a randomized trial comparing total mastectomy, lumpectomy, and lumpectomy plus irradiation for the treatment of invasive breast cancer. N Engl J Med 2002;347:1233-41 — https://eutils.ncbi.nlm.nih.gov/entrez/eutils/efetch.fcgi?db=pubmed&id=12393820&retmode=xml
• Fisher B, Jeong JH, Anderson S, et al. Twenty-five-year follow-up of a randomized trial comparing radical mastectomy, total mastectomy, and total mastectomy followed by irradiation. N Engl J Med 2002;347:567-75 — https://eutils.ncbi.nlm.nih.gov/entrez/eutils/efetch.fcgi?db=pubmed&id=12192016&retmode=xml
• NCI PDQ, Breast Cancer Treatment (Health Professional Version) — https://www.cancer.gov/types/breast/hp/breast-treatment-pdq

How this article was prepared

An AI-assisted editorial system helped prepare this page. No named medical reviewer has reviewed it unless one is listed.

The National Cancer Information Foundation publishes Cancer Explained. This page is for learning. It is not medical advice and does not suggest a test or treatment.

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