Left handedness may be linked to an increased risk of breast cancer

Left handedness may be linked to an increased risk of breast cancer, finds new research published online by the British Medical Journal.

Researchers in the Netherlands examined the relation between handedness and incidence of breast cancer in over 12,000 healthy, middle aged women born between 1932 and 1941.

Body measurements were taken and risk factors such as social and economic status, smoking habits, family history of breast cancer, and reproductive history were recorded.

They found that left handed women were more than twice as likely to develop premenopausal breast cancer as non-left handed women. Adjusting for risk factors hardly affected the overall association.

The origin of the association may lie in exposure to high levels of sex hormones before birth, which can induce left handedness as well as changes in breast tissue, say the authors.

"Although the underlying mechanisms remain elusive, our results support the hypothesis that left handedness is related to increased risk of breast cancer," they conclude.

Comments

The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of News Medical.
Post a new comment
Post

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.

You might also like...
Revolutionary AI tool detects multiple cancers in whole-body PET/CT scans