Table 3.

Recommendations for long-term and cohort studies to collect tumor tissue samples

Recommendation	Purpose
Gain broad consent for collection of samples from future diagnoses upon study enrollment	Broad consent that authorizes future contact and collection may be more likely to result in a higher tissue consent rate. Building a relationship before diagnoses may alleviate potential stress and inconvenience to cancer patients from being asked to participate in cancer studies during treatment and diagnosis
Target cases from within the last 10 years	Hospitals may be more likely to have samples from the last 10 years