Wiencke: They're more likely to not survive
following their surgery at a rate that's four times
that of patients that don't have these mutations.
Narrator: More study is needed, but Wiencke
says it may be estrogen that makes this mutation
more common in women.
Wiencke: There had been for some time an
idea that this mutation may cooperate with estrogens
and promote the growth of cells, particularly cells
that exist in the lung. And apparently K-ras expression
increases the number of receptors on cells and this
would make perhaps, a cell more responsive to estrogen
and it's growth-promoting effects.
Narrator: For Science Today, I'm Larissa