S100A4 and prostate cancer: FSP1, also known as S100A4 (calcium-binding protein S100A4), is known to acceleratetumorigenesis as well as invasion of human prostate cancer via thetranscriptional control of matrix metalloproteinase 9.45,46CD34 is a surface marker found on hematopoieticstem cells and is observed to be frequently expressed on the vascularendothelium of newly formed blood vessels.