At least in women, according to a recent study. You can read the entire article at BBC NEWS | Health | Obesity ops 'may cut cancer risk'.

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"Even though I'm no more than a monster - don't I, too, have the right to live?" -- Oldboy (2003)

They reduce a lot more than that. Studies are showing that the Lap Band cures type 2 Diabetes. People that are not even obese are getting it done for that very reason. Of course I am biased, having had the operation almost a year ago and having dropped 150 lbs so far.

Oh really weight loss operations can reduce a cancer risk. Well, that is additional information for having a weight loss operation can reduce a cancer risk. However, if too many dieting are bad to our health.