Category Archives: Published Journal Articles

Safety of Breastfeeding with Silicone Breast Implants

Jae Hong Lee, MD, MPH and Diana Zuckerman, PhD, Pediatrics: November 2002

To the Editor–

More than 200,000 breast implant augmentation procedures are performed annually in the United States, most on teenagers and young women of reproductive age.1 As a result, many nursing mothers have breast implants –all composed at least in part of silicone.

The American Academy of Pediatrics (AAP) policy statement on silicone breast implants and breastfeeding concluded that the “Committee on Drugs does not feel that the evidence currently justifies classifying silicone implants as a contraindication to breastfeeding.”2 We agree that there is a lack of data to contraindicate breastfeeding by women with breast implants, but there are also no convincing data providing it is safe. The available studies have too many methodological shortcomings, and this problem is apparent in the 3 reports cited by the policy statement as evidence supporting the safety of breastfeeding by mothers with breast implants.3 4 5

The AAP statement quotes one study, by Semple et al.,6 to note that “silicon is present in higher concentrations in cow milk and formula than in milk of humans with implants.”7 That may be true, but silicon differs substantially from silicone, and silicon levels are not an adequate measure of silicone content of breast milk.8 Silicone is an organic polymer that contains elemental silicon, and silicone is not biologically inert.9 It is unknown what long-term effects silicone ingested through breast milk will have on the health of nursing infants.

A second study cited by the AAP policy statement directly assayed silicone polymer and found that silicone levels in the milk of women with implants were not significantly different from those in control human milk samples.10 However, only 6 samples of milk from lactating women with breast implants were obtained– a sample too small to permit broad generalizations. Silicone is known to leak from breast implants when they are intact, and even more when ruptured.11 The highly variable condition of breast implants can cause significant variation in the silicone content of breast milk.

The third study cited by the AAP statement purports to demonstrate no increased risk for connective tissue diseases or congenital malformations among children of mothers with breast implants. However, it included only 279 children born after their mothers received breast implants. That sample size is too small to adequately study the incidence of such uncommon disorders.

Breastfeeding confers numerous benefits on nursing infants and physicians should continue encouraging the practice.12 However, the safety of breastfeeding by women with silicone breast implants has not been adequately studied — a fact these women should be told. We urge the AAP to revise their policy statement to acknowledge the lack of safety data. More importantly, additional studies need to be conducted on this very important issue.

 

The Second Coming of Breast Implants

Diana Zuckerman, IRIS Magazine: A Journal About Women, special issue on The Politics of the Body, Issue 38: Winter/Spring 1999

More than 120,000 American women, many of them in their teens and early 20s, underwent surgery for breast implants last year. After years of controversy had cooled enthusiasm for implants, more women are choosing them than ever before.

As a former Congressional staffer who initiated the investigation of the safety of breast implants in 1990, and as a psychologist who has studied women’s body image, I have tried to understand this resurgence. We are, after all, bombarded with images of implanted breasts every time we open the newspaper and see an ad for lingerie. Those very thin bodies with large chests don’t happen in nature very often, but they have become the expected ideal in the 1990s. And yet, more than thirty-five years after the first breast implant, we still know little about the long-term risks, and face growing evidence of the short-term problems. How did this happen?

When I left academia to work in the U.S. Congress, I expected to have to give up my interest in women’s body image and self-esteem. So I was intrigued when I received a telephone call from a young woman, telling me that her mother was having terrible problems with her silicone breast implants. It was 1990, and approximately 100,000 women had surgery with breast implants that year, only twenty percent for reconstruction after a mastectomy. Plastic surgeons were telling patients that implant surgery was the safest of all surgical procedures. In some communities, a teenage girl would receive implants to “look her best” for the senior prom. And television comedies included the topic as a humorous story line.

Since I investigated federal health policies, the young woman asked me to look into the safety of these implants. I promised that I would talk to her mother about her mother’s implants, thereby starting a Congressional investigation that eventually resulted in the Food and Drug Administration (FDA) removing silicone implants from the market.

The Investigation Begins

When I first spoke to women with implant problems, their stories seemed difficult to believe. They told me about silicone dripping from nipples, breasts so hard that they were embarrassed to be hugged, and breasts deformed by ruptured implants or by the surgery that attempted to remove the defective product. As word got out about my investigation, I received many calls and letters, and the stories began to sound eerily alike, a pattern that my post-doctoral training in epidemiology had taught me to take seriously. Perhaps most compelling were the many young women who described feeling like their grandmothers, exhausted by simple daily tasks, unable to recover from flu-like illnesses, or disabled by joint or muscle pain that left them unable to work or care for their families. Virtually all claimed that their doctors did not take their complaints seriously.

I reviewed all the medical literature, looking for confirmation or contradictions. There were only small studies, published by plastic or cosmetic surgeons, talking about the advantages and disadvantages of various types of implants and surgical techniques. In a never-ending cycle, every few years “new and improved” implants or techniques replaced the older ones, which were inevitably unsatisfactory over the long-term.

I spoke with plastic surgeons, and most assured me that breast implants were “completely safe.” They emphasized that women chose surgery for themselves, to become more self-confident, not to please men. One plastic surgeon told me with pride: “My happiest patients are those who have just had breast reduction surgery. My next happiest patients are those who have just gotten breast implants to increase the size of their breasts.” As a psychologist who had studied women’s body image, I believed him. The surgeons also acknowledged that some women’s breasts became very hard or painful, and that some women lost sensation in their nipples – these symptoms were not considered serious. But if reports from the implant patients were accurate, major health problems could develop over the next few months or years, and patients’ satisfaction might be short-lived.

I started with the contradictions: doctors claiming that their patients were very happy, patients claiming that they were ill, and an alarming lack of objective, published research. And underlying it all, the question: How could so many women have undergone breast implant surgery with virtually no human studies to indicate whether or not implants were safe?

A Brief History of Breast Implants

The history of breast implants helps to answer that question. At the end of World War II, barrels of industrial silicone mysteriously disappeared from the docks of Japan; the silicone was injected into the breasts of Japanese prostitutes to make them more attractive to American GIs. Sometimes, the silicone eventually migrated to other parts of the body, including vital organs, causing deformities, illness, and some deaths. Nevertheless, the procedure became increasingly popular, and thousands of Las Vegas show girls, actresses, and others in the entertainment business were injected with liquid silicone before it finally became illegal.

By 1962, breast implants consisting of a silicone envelope filled with silicone gel were “tested” on a thirty-year-old divorced mother of six who had gone to a Texas charity hospital to have tattoos removed from her breasts. She claimed the operation changed the way men looked at her, she recently recalled; within months, she had remarried.

Breast implants remained relatively rare throughout the 1960s and early 1970s. One common complaint was that the “augmented” breasts often felt hard. In the 1970s, the manufacturers developed a silicone implant with a thinner envelope and more fluid “lifelike” silicone gel inside. The new implants felt oily, broke more easily, and when they broke inside the body the silicone gel could spread, making total removal difficult or impossible. These augmented breasts also felt hard; apparently, the scar tissue that formed around the implant caused the uncomfortable and embarrassing hardness, not the consistency of the implant itself.

During all these years, implants were sold without any government oversight. In 1976, the FDA was finally given authority to regulate medical devices, including breast implants. Because of the huge backlog of devices to evaluate, most were allowed to be sold while awaiting review. Since breast implants were considered cosmetic, they were not a high priority.

Over the years, the FDA received thousands of reports of serious problems among implant patients, and scientists at the FDA became concerned. Several physicians published articles about implant patients with serious autoimmune diseases, such as scleroderma. Although consumers were not warned, by the late 1980s, the FDA’s breast implant advisory committee convinced the agency to require manufacturers to conduct safety studies. Meanwhile, the American Society of Plastic and Reconstructive Surgeons (ASPRS) provided information to the FDA in support of breast implants, and claimed that there was “a substantial and enlarging body of medical opinion that these deformities [small breasts] are really a disease.”

The Breast Implant Controversy, 1990-present

By the time I started my investigation, plastic surgeons estimated that two million women had breast implants. With no objective studies, plastic surgeons instead quoted their own marketing survey, which reported that ninety percent of implant patients were “very satisfied.”

During 1991-92, public attention resulted in more reports of serious health concerns and rapidly escalating numbers of “adverse reaction reports” that physicians made to the FDA. It also became apparent that the estimate of two million implant patients had been based on the implants sold, not the number of women who had undergone surgery. Since most women had at least two implants and many had replacements, there were probably fewer than one million women with implants. This smaller denominator meant that the proportion of patients who were ill was twice as high.

When the FDA responded to Congressional pressure to require scientific studies, the ASPRS charged each of its members a fee of $1,050 for a lobbying campaign. They hired professional lobbyists and enlisted the support of their patients, especially those with mastectomies. They flew in almost 400 women with breast implants from all over the country to meet with Congressional representatives, and orchestrated a write-in campaign. Congress received more than 20,000 letters, most from nurses and patients. In addition, the surgeons’ PAC made generous contributions to Congressmen “to express the Society’s support and gratitude to legislators who help us communicate our message on breast implants.” As a result, more than 200 Congressmen and Senators wrote to the FDA Commissioner advising him to keep implants on the market.

Breast cancer patients were very effective lobbyists, because they had chosen implants to help them cope with the ravages of a potentially fatal disease. Ironically, they were advised to use a feminist argument: women should have “the right to choose” breast implants.

Women with implant problems also attempted to lobby their Congressmen; they pleaded that the FDA should make sure that breast implants were safe. Some even brought photographs of their deformed breasts to convey the seriousness of their problems. However, they were much fewer in number than the pro-implant lobbyists. Many of the ill women had lost their health insurance and their jobs, and had limited resources to come to Washington. Unlike the satisfied implant patients, there was no interested financial entity to pay their airfare and hotel costs.

When the FDA held a public hearing at their advisory committee meeting to determine whether breast implants should be sold despite the lack of safety data, the pro-implant breast cancer patients were once again an effective counterbalance to the very sick implant patients who also testified. The FDA was in the uncomfortable situation of deciding whether to “take away women’s right to choose” implants, or follow their regulations and remove implants from the market because the manufacturers had not conducted sufficient studies to determine whether they were safe.

The FDA seemed poised to keep implants on the market, when a court case unexpectedly turned the tide. In December 1991, several corporate documents were made public by a reporter covering one of the implant lawsuits against Dow Corning. These internal memoranda showed that scientists and salesmen had expressed serious concerns about the implants’ safety, but that Dow had sold the implants anyway and had never made these concerns public. Media coverage was scathing, and the FDA reviewed the newly available information.

In 1992, FDA Commissioner Dr. David Kessler put a temporary moratorium on the sale of silicone gel breast implants. He later limited their use to women with mastectomies or ruptured implants that needed replacement. The eighty percent of customers who merely wanted to increase their breast size were no longer permitted to buy silicone gel implants because of potential risks. However, they could buy saline breast implants, which consist of a silicone envelope containing saline. These implants had also never been tested, but were assumed to be safer than silicone gel.

Since then, researchers have published several epidemiological studies on the safety of silicone implants. Most have not evaluated many of the illnesses and symptoms mentioned by implant patients. Most studies have focused on cancer, scleroderma, and a few other classic autoimmune diseases, and found no statistically significant increase. However, the studies have major shortcomings; for example, most include a few hundred or at most a few thousand women with implants, which is not large enough to study rare diseases like scleroderma, which afflict less than one in 5,000 women. Moreover, most of the studies include many women who have had implants for a few months or years, even though these diseases take many years to develop.

Meanwhile, litigation has become a multi-billion-dollar activity. In 1994, the top four manufacturers (Dow Corning, Bristol-Myers Squibb, Baxter International and 3 M) proposed a $4.3 billion settlement, which the court rejected as insufficient when more than 400,000 women signed up. In 1995, Dow Corning filed for Chapter 11 bankruptcy protection, and was removed from the settlement. After years of renegotiation, Dow’s current proposal of $3.2 billion is expected to be approved. Meanwhile, Dow Corning stopped selling any silicone implants, although they still sell silicone to other implant manufacturers. Since the FDA restricted the use of silicone gel implants, the popularity of saline breast implants increased by 1000 percent to more than 120,000 American women last year.

The Role of Women

Women have not been passive victims in this saga. Women first successfully challenged the conventional wisdom that implants were safe, overcoming their embarrassment to contact me, others in Congress and the media. Celebrities Jenny Jones and Mary McDonough (who played Erin on The Waltons) provided important support to other implant patients by being outspoken in discussing their problems.

Although my boss, the late Rep. Ted Weiss (D-NY), chaired the hearing and investigation and was sometimes criticized as a man interfering with “women’s right to choose breast implants,” a woman conducted the investigation, and he was supported by many women who thanked him for his efforts. Meanwhile, a Congresswoman diagnosed with breast cancer, Rep. Marilyn Lloyd, discovered that the implants her plastic surgeon preferred had become unavailable. Rep. Lloyd enlisted other Congresswomen to oppose the FDA’s regulatory efforts because she was convinced implants were safe and wanted them to be available for herself and for other mastectomy patients.

In the early days of the investigation, women reporters were particularly interested in the safety questions. However, male reporters, at NBC News, The New York Times, and The Montreal Gazette, were most persistent in covering the story during the early 1990s, and they were as outraged as any of the women. In the last few years, media coverage has spun 180 degrees, and most newspaper articles now sound eerily like the corporate spin doctors, dismissing the women’s claims of illness and any research supporting their claims, and declaring instead that there is “no research evidence” that implants cause health problems. Two women, Gina Kolata of The New York Times and Dr. Marcia Angell of The New England Journal of Medicine, have been instrumental in supporting the view that implants are safe, and many reporters have followed their lead.

Between the contradictory positions of the ill women with implants, the conflicting research claims, and multi-billion-dollar settlements, where does the truth lie? Nobody knows for sure, not even the women who will exercise their “right” to choose implants this year.

All articles are reviewed and approved by Diana Zuckerman, PhD, and other senior staff.