Thanks for your question on Health Care Magic.
I can understand your concern.
Honestly speaking, no treatment is required for
pectus carinatum (pigeon chest).
It is developmental defect of
rib cage.
Surgical correction is very risky and 100% successful correction of the
deformity is next to impossible.
But if patient is having underlying lung developmental defect, breathlessness, collapsed lung, low
oxygen saturation etc than only surgical correction is required.
Just for the cosmetic purpose, better not to go for surgery.
And if surgery is indicated than repositioning of breast bone with removal of
cartilage is best option.
Hope I have solved your query.
Wishing good health to your daughter. Thanks.