This articles explains that considerations need to be taken regarding tissue used for research WITHOUT PATIENT PERMISSION.
http://www.nytimes.com/2015/12/30/opinion/your-cells-their-research-your-permission.html?_r=1
Basic ethical principles in research involving human subjects are outlined in the Belmont Rules:
http://www.hhs.gov/ohrp/humansubjects/commonrule/index.html
Common rules governing these provisions are undergoing sweeping revisions
http://www.regulations.gov/#!documentDetail;D=HHS-OPHS-2015-0008-0001