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Weight loss prior to endometrial cancer surgery improves outcomes

Women with obesity and endometrial cancer who lose weight in advance of surgery have fewer complications and shorter hospital stays, according to preliminary results from a study by researchers at the University of Alberta. Indeed, the preliminary study results are so compelling that the Lois Hole Hospital for Women has changed its standard of care.

Sophia Pin (Photo: Christy Dean)

Dr Sophia Pin, an assistant professor in the Department of Obstetrics and Gynecology at the University of Alberta and physician at the Cross Cancer Institute and Royal Alexandra Hospital, explained previous research has shown that weight loss before treatment for other types of surgeries reduces both surgical and patient complications.


“We wanted to examine if weight loss prior to surgery for endometrial cancer can also affect complication rates,” said Pin. “Our preliminary results are so compelling that the Lois Hole Hospital for Women is now referring any women with a new diagnosis of endometrial cancer and a body mass index over 40 to the preoperative weight loss clinic.”


Endometrial cancer is the fourth most common cancer in women and is often related to obesity due to hormonal changes, including an increase of oestrogen that affects the lining of the uterus. More than 50 per cent of endometrial cancer is related to obesity, and women with a BMI greater than 25 are two to four times more likely to develop uterine cancer than those with a lower BMI.


Minimally invasive surgery is the standard of care for this type of cancer, however, Pin explained that obesity is a significant issue in surviving endometrial cancer.


“Women with obesity have an increased risk of complications both during and after surgery,” said Pin, who is also a member of the Women and Children’s Health Research Institute (WCHRI). “In addition to challenges with anaesthesia and ventilators, we are not always able to do minimally invasive surgery due to reduced surgical visualisation, which also increases complication risks and mortality.”


For more than a year, Pin has been working with women with either pre-cancer or low-grade endometrial cancer and a BMI greater than 40. These women are referred to a preoperative weight loss clinic for three to six months before surgery, where nutritional strategies or weight loss medications are used to support weight loss.


“We are looking at measurable outcomes prior to, during and after surgery and then also assessing the patient's experience and their satisfaction, and the maintenance of weight loss,” explained Pin.

Although she’s only halfway through the project, more than 88 per cent of the women in the study have lost weight, with the average weight loss being 11.5 kilograms (25lbs).


“We’ve just started following up with these women, one year later, to see how satisfied they are,” she said. “We want patients to feel supported and heard throughout the process, and feel that we're not just talking about their weight loss, but also giving them options for management for both their weight loss and for their cancer.”

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