What you need to know about Jolie's mastectomy

Angelina Jolie has had a preventive double mastectomy.Photo / AP
Angelina Jolie has had a preventive double mastectomy.Photo / AP

Oscar-winning actress Angelina Jolie has revealed that she had a preventative mastectomy after learning she had a gene that significantly raised her risk of breast cancer. Here's a crash course in the procedure Jolie had and why.

Q: What kind of surgery did Jolie have?

A: Jolie had a preventative double mastectomy, meaning she chose to have both her breasts removed even though she had not been diagnosed with cancer.

Q: Why did she have the masectomies?

A: Jolie says that she has a "faulty" version of the BRCA1 gene that means she has an 87 per cent chance of getting breast cancer. By having both breasts removed preventatively, she said her breast cancer risk drops to 5 per cent.

Q: What did the procedure involve?

A: In double mastectomies, surgeons typically remove as much breast tissue as possible. In Jolie's case, because she was having a reconstruction done shortly afterward, the doctors preserved the skin covering her breasts, inserting "fillers" where the breast tissue would have been, to keep the skin elastic. According to Jolie, she had implants put in nine weeks later.

Q: How many women have this faulty gene?

A: Only a small percentage of women have this same faulty gene, or a similar mutated version of a related gene, BRCA 2. These mutations are most commonly found in women of Eastern European Jewish descent; one study found 2.3 per cent of women in that group had the mutations - about five times higher than in the general population. Other ethnic groups, including the Norwegian, Dutch and Icelandic people, also have slightly higher rates of these mutations.

Q: How do these genes increase a woman's chance of breast cancer?

A: The average woman has a 12 per cent risk of developing breast cancer sometime during her life. In comparison, women who have inherited a faulty version of a breast cancer gene are about five times more likely to get breast cancer. In the US, about 5 to 10 per cent of breast cancers are thought to be linked to harmful versions of the BRCA1 and BRCA2 genes.


Q: What other options might Jolie have had?

A: Doctors would likely have suggested earlier screening tests, including mammograms or MRIs, although those would only help them spot breast cancer earlier, not prevent it. They might also consider using breast cancer drugs preventively, though trials into their long-term use is still ongoing. "This is not a decision that people take lightly," said Dr Emma Pennery, clinical director at the British charity, Breast Cancer Care. "You cannot decide to have a double mastectomy next week."

- AP

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