A report submitted to the New England Journal of Medicine claims that removing uterine growths may actually increase the risk of spreading cancer. In some cases, it's believed to have tripled the odds of death within five years.
At a 2011 U.S. convention, South Korean researchers said the mortality rate of women at a big medical center in their country whose leiomyosarcoma tumors were removed intact during hysterectomies was 19% after 63 months, compared with 44% after 39 months for woman whose tumors were removed using morcellators.

The article submitted to the New England Journal reviewed 10 studies of 30,000 women who underwent morcellation in several countries and concluded that nearly 1 in 400 women were found to have uterine sarcoma in the removed tissue.
About 20% to 40% of women over the age of 35 develop fibroids, which are the most common reason for hysterectomies. Usually these fibroids are benign, but a growing number of experts have suggested that "uterine sarcomas aren't as rare as believed and women aren't being adequately informed of the risk of the morcellation procedure.

The procedure involves using a power tool is used to grind up fibroids into smaller pieces, which will then be removed through smaller incisions. This minimally invasive method is popular due to the smaller scars and quicker recovery time.

[WSJ]