Breast cancer is the most common cancer in women worldwide, comprising 23% of all
cancers, with more than 1 million new cases per year. 1 The main risk factors are related to …

The Collaborative Group on Hormonal Factors in Breast Cancer has brought together the
worldwide evidence on menopausal hormone therapy (MHT) and the incidence of invasive …

SIR—Several research groups have found that the interval cancer rate—ie, the incidence of
breast cancer in the interval between mammographic screens, is higher in the NHS Breast …

Breast cancer: cause and prevention Page 1 883 Breast cancer: cause and prevention
Introduction Breast cancer is the second most common cancer among women in the world; in …

For personal use. Only reproduce with permission from The Lancet alternative support.
There is a great need for a public information campaign, led by the medical professions …

CORRESPONDENCE and other risk factors is mistaken. Chance differences will arise and
are more likely with the cluster randomisation used in some of these trials because there are …

Comment www. thelancet. com Vol 394 September 28, 2019 1117 greatest effect on the use
of hormone replacement therapy [HRT], but to my knowledge this has not been formally …

The longer a woman is exposed to cycling reproductive hormones the higher her risk of
breast cancer. If she has an early menarche or a late menopause, or both, her risk of breast …

1 Million Women Study Collaborators. Breast cancer and hormone-replacement therapy in
the Million Women Study. Lancet 2003; 362: 419–27. preparations for less than 1 year might …

1 Peto R, Boreham J, Clarke M, Davies C, Beral V. UK and USA breast cancer deaths down
25% in year 2000 at ages 20–69 years. Lancet 2000; 355: 1822. 2 Veronesi U …