Saturday, May 3, 2025

Pregnancy and breast cancer

 Pearls

  • Anthracyclines are safe and should be done q 3 weeks not DDAC
  • Taxanes are now considered safe, but may need higher doses due to placental breakdown
  • Platinum agents are safe, but low albumin levels can lead to toxicity
  • 5FU and xeloda safe, but no clear role in pregnancy
  • Contraindicated in pregnancy and lactation: trastuzumab, ADC, PARP inhibitor, methotrexate( pregnancy)
  • Endocrine therapy is contraindicated
  • Supportive care: Reglan ( safe) promethazine ( safe), olanzapine for highly emetogenic regimens. Dexamethasone can cross the placenta and affect fetal head growth ( short term use ok).
  • Insufficient data re: safety of bisphosphonates, CDK4/6 inhibitor HER 2 TKI, IO, use of growth factors
Radiation: contraindicated

When to resume chemo post delivery: 
  • 2 weeks after vaginal delivery and 4 weeks after C section. 
  • Use DVT prophylaxis with lovenox for 6 weeks

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