left-handedness seems to be associated with the risk of breast cancer

[Lani]

and an hypothesis of why that may be:

Br J Cancer. 2007 Aug 7; [Epub ahead of print]
Left-handedness and risk of breast cancer.

Fritschi L, Divitini M, Talbot-Smith A, Knuiman M.
1Western Australian Institute for Medical Research, Nedlands, Perth, Western Australia 6009, Australia.
Left-handedness may be an indicator of intrauterine exposure to oestrogens, which may increase the risk of breast cancer. Women (n=1786) from a 1981 health survey in Busselton were followed up using death and cancer registries. Left-handers had higher risk of breast cancer than right-handers and the effect was greater for post-menopausal breast cancer (hazard ratio=2.59, 95% confidence interval 1.11-6.03).British Journal of Cancer advance online publication, 7 August 2007; doi:10.1038/sj.bjc.6603920 www.bjcancer.com.
PMID: 17687338 [PubMed - as supplied by publisher]

[Sheila]

At least I know why....OK, so Left handed does not just mean we are in our right mind
For the record, Left Handed ER - PR -

[Brenda_D]

Right handed here, and my BC was ER- PR-

[Mary Jo]

Same as Brenda. Right handed - er/pr neg.

Mary Jo

[Shell]

I remember my surgeon asking me this on the initial questionnaire - left handed and ER/PR- and her/2neu+++

Regards,

[mslinda]

I'm right handed, er/pr-.

Linda
S. Mississippi

[BonnieR]

Left handed. ER+, PR-, HER2+++

[cafe1084]

also right handed and er/pr-, her2+

[SusanC]

Left-handed, ER-/PR+, Her2+.....go figure...
Susan C

[weezie1053]

I'm a lefty and ER/PR- and Her2Neu+. Also clumsy as Hell so I'll never live to be 100, but I'm damn well trying. :-)

[Chelee]

Left handed, Er & Pr weakly positive. Her2/neu 3+++.

Chelee

[Roz]

Me Too,
Left Handed, daughter and grand daughter left handed. However on a more positive note, my aunt was also left handed and no br. ca.

[PinkGirl]

Left handed
ER/PR+
Her2+++

[juanita]

Left handed, er/pr-. I have a daughter who is left handed.

[fauxgypsy]

Mostly right handed, but definitely right brained. ER+, PR+, Her2 +++. Somewhat ambidextrous, which has really come in handy this past two weeks since my surgery.

Leslie

[mom22girlz]

Left handed
ER/PR+
Her2+++

[sherri]

right handed, ER-/PR- HER2+++

[ExpectAMiracle]

Left handed, ER/PR-, Her2 +++

Looks like quite a few lefties here!

[KellyA]

Lefty here! ER/PR-, Her2 +++

Love, Kelly

[Bev]

Very right handed. Triple pos. Just don't know. BB

[weezie1053]

Just curious as to what the tally is so far, i.e., lefties vs. righties?

[Wendywins]

right-handed , ER-PR-, Her2neu +++

[jhandley]

lefty er/pr - her2+++
jackie down under

[michka]

Right handed. Triple positive.
Michka

[sassy]

Right handed, triple positive.

[Joan M]

Left-handed.

Was also post-menopausal due to a full hysterectomy. I had thee years of HRT after that, and the day after I stopped taking Premarin I had a mammo which showed two tumors -- one infiltrating, one DCIS.

Perhaps there's something to the left-handed theory. After all, it flies in the face of reason considering most of the population is right-handed (unless, of course, the gene pool is really small, which might change that).

[mimiflower07]

very lefty very 3 pos
suzanne

[MJo]

Right handed, triple positive