The research is published in the July 9 issue of the Journal of the National Cancer Institute. Researchers say this could impact follow-up care, which now often includes mammograms of the affected breast every six months, but only yearly mammos on the second breast. Because some HR- tumors grow so rapidly but are not detected on mammograms until they are so large they are deadly, the researchers suggest that women with HR- be given a yearly MRI.
The study included 4,927 women with breast cancer; 3,701 of those had HR+ and 1,226 had HR-. There was no information on Her2 status.
Some stats from the research:
• Nearly 1 in 25 breast cancer survivors will develop a second breast cancer in the same breast within 6 months of the original diagnosis.
• Women with HR+ breast cancer had twice the risk of cancer in the second breast than the general population.
• Women with HR- had more than three times the risk compared to women with HR+. NOTE: THis is compared the HR+ women who had twice the risk of the general population.
• Women under 30 with HR- had a significantly increased risk of getting HR- in the second breast.
• Blacks, Hispanics, and Asians or Pacific Islanders were at a higher risk than non-Hispanic whites.
Read more here.