The weight-loss surgery techniques used in the study may also partly explain the findings.

CNN: Study: Weight-loss surgery cuts cancer risk in women

Still, this is not the first study to suggest that weight-loss surgery does not reduce cancer risk in men, and it's possible that hormonal differences between the sexes may play a role.

CNN: Study: Weight-loss surgery cuts cancer risk in women

Some of the more common side effects of weight-loss surgery can be difficulty digesting starchy foods and protein, which can lead to other physical conditions including hair loss, fatigue, swelling and muscle weakness.

CNN: Surgery helps woman drop 135 pounds, 10 dress sizes

While he may look different, down 115 pounds since his weight-loss surgery, the 50-year-old Ryan insists he has never been asked by Johnson or Idzik to tone down his ways.

WSJ: Goal for Jets' Ryan remains same despite changes

When her insurance company announced that bariatric surgery, or weight-loss surgery, would be covered under the couple's plan, she told her husband about it.

CNN: Learning to eat again: Man drops 130 pounds after surgery

Rep. Jesse Jackson Jr. has been diagnosed with bipolar disorder, which may be connected to a weight-loss surgery he had eight years ago, according to the Mayo Clinic, where he is being treated.

WSJ: Jesse Jackson Jr. Has Bipolar Disorder, Mayo Clinic Says