The occurrence of breast cancer during pregnancy is a rare clinical si
tuation. However, if it is diagnosed, a multidisciplinary approach inv
olving an obstetrician, a medical oncologist and a surgeon is needed.
In this situation, breast cancer should be treated according to the sa
me principles applied in nonpregnant patients. Termination of pregnanc
y does not improve survival. Decisions regarding abortion should be ba
sed on The desires of the patient and on therapeutic necessities. If r
equired, surgery is always possible: but radiation therapy should be a
voided because of the risk of fetal toxicity. Antineoplastic drug ther
apy, if indicated, is possible after the first trimester.