According to the journal "Science" US researchers in Baltimore have developed a new blood test at Johns Hopkins University to detect eight types of tumors even before symptoms of cancer appear.
See Publication:
Science 23 Feb 2018:
Vol. 359, Issue 6378, pp. 926-930
DOI: 10.1126/science.aar3247
http://science.sciencemag.org/content/359/6378/926.long
If you would like to obtain more information about the “Blood Donor BIOBANK”,