Use of estrogen alone did not increase lung cancer mortality in postmenopausal women, according to a study published online August 13 in The Journal of the National Cancer Institute. In the Women's Health Initiative (WHI) trial, which consisted of several clinical trials on postmenopausal women, one study showed women with previous hysterectomy taking combined estrogen plus progestin therapy had a statistically significant increase in lung cancer mortality, but not incidence. Other studies with combined hormone therapy have had conflicting results. But the influence of estrogen alone was unclear.
More...