cell free DNA circulating for cancer
NYT recently ran an article as well:
http://www.nytimes.com/2014/04/08/business/cancer-analysis-tools-circumvent-biopsies.html
http://www.nature.com/nm/journal/v20/n4/abs/nm.3511.html
An ultrasensitive method for quantitating circulating tumor DNA with broad patient coverage
http://www.nature.com/nm/journal/vaop/ncurrent/abs/nm.3519.html
http://stm.sciencemag.org/content/6/224/224ra24
http://www.nejm.org/doi/full/10.1056/NEJMoa1213261
http://stm.sciencemag.org/content/4/162/162ra154.full
DIAGNOSTICS: Detection of Chromosomal Alterations in the Circulation of Cancer Patients with Whole-Genome Sequencing