Claire Rowney, chief executive at Breast Cancer Now, said:
"Everyone at Breast Cancer Now is extremely saddened to hear that Christina McKelvie MSP has died.
"Christina supported our wear it pink in the Scottish Parliament for more than a decade, even before her own diagnosis, championing the issues that matter most to people affected by breast cancer.
"She has been a strong advocate for women regularly checking their breasts and attending their breast screening appointments, and championed the importance of data around secondary breast cancer being collected to help improve treatment and care.
"We are so grateful to Christina for all she did to amplify the voices of women with breast cancer, and for all the incredible support she has given us over the years. Our thoughts are with her family, and everyone who knew and loved her."
ENDS