New blood tests promise simple, cost-effective diagnosis of gastrointestinal cancersBerlin, Germany: Promising results from two new blood tests that can aid in the early identification of patients with gastrointestinal (GI) cancers will be presented at Europe\'s largest cancer congress, ECCO 15 – ESMO 34 [1], in Berlin today (Monday September 21). The tests will make GI cancer detection simpler, cost-effective, and more acceptable to patients than current methods, the researchers say.