HER2 Support Group Forums - View Single Post - Liver Mets: What Does 60% Progesterone Positive Mean

Becky · 12-16-2010, 04:14 PM

It means that when they stained a piece and looked at the tumor, 60% of the cells showed an over abundance of progesterone receptors. That is what the percentages mean (and when they stained some for the estrogen receptor, they didn't see any cells that had an over abundance) - hence ER negative, PR 60%.

12-16-2010, 04:14 PM	#2
Becky Senior Member Join Date: Sep 2005 Location: Stockton, NJ Posts: 4,179	Re: Liver Mets: What Does 60% Progesterone Positive Mean It means that when they stained a piece and looked at the tumor, 60% of the cells showed an over abundance of progesterone receptors. That is what the percentages mean (and when they stained some for the estrogen receptor, they didn't see any cells that had an over abundance) - hence ER negative, PR 60%. __________________ Kind regards Becky Found lump via BSE Diagnosed 8/04 at age 45 1.9cm tumor, ER+PR-, Her2 3+(rt side) 2 micromets to sentinel node Stage 2A left 3mm DCIS - low grade ER+PR+Her2 neg lumpectomies 9/7/04 4DD AC followed by 4 DD taxol Used Leukine instead of Neulasta 35 rads on right side only 4/05 started Tamoxifen Started Herceptin 4 months after last Taxol due to trial results and 2005 ASCO meeting & recommendations Oophorectomy 8/05 Started Arimidex 9/05 Finished Herceptin (16 months) 9/06 Arimidex Only Prolia every 6 months for osteopenia NED 18 years! Said Christopher Robin to Pooh: "You must remember this: You're braver than you believe and stronger than you seem and smarter than you think"