I received a call the other day from a mom, 2 weeks postpartum with 2nd baby. She had a mastectomy 3 years ago - breast lump detected while nursing her 13 month old. She feels breastfeeding is going well - baby was back to birthwt in less than 2 weeks and is devastated that her oncologist wants her to stop breastfeeding because the tumor marker for CA27 & 29 came back elevated last week. Her doctor wants to check the level again after she has stopped breastfeeding. Her question, and mine: are there any studies, research, literature that addresses breastfeeding and tumor markers? She is wondering if perhaps breastfeeding hormones may contribute to an elevated level - she states that levels are often elevated during pregnancy. Thanks in advance for any info and/or advice. Misako Miller RN, IBCLC *********************************************** The LACTNET mailing list is powered by L-Soft's renowned LISTSERV(R) list management software together with L-Soft's LSMTP(TM) mailer for lightning fast mail delivery. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html