Colorectal Cancer (CRC) is the third most commonly occurring cancer in men and the second most commonly occurring cancer in women. CRC can often be prevented through regular screening. Although colonoscopy-based screening programs help identify potential cancer cases early which is essential for decreasing the CRC incidence, the compliance rate of the people to perform the required screening is still too low and not the desired one due to the intrusive nature of the methods and general public perceptions. Fecal Occult Blood Testanother (FOBTs) is another widely used screening modality for CRC but has certain constrains to use, such as relatively low sensitivity and the need of multiple samplings to reach the full screening potential. Therefore there is a need for the development of novel, less intrusive screening methods that can effectively increase the screening rates for CRC through non-invasive, repeatable, cost-effective, easy-to-use, and patient-friendly procedures. This is of particular importance in different European societies and population subgroups, since an increase in the incidence of Early Onset CRC is currently noticed which is significantly associated with risk factors such as heredity, obesity, smoking, alcohol abuse and hyperlipidemia. Within this context, ONCOSCREEN develops a multi-tier diagnostic solution towards an improved CRC screening. Towards this goal, ONCOSCREEN considers various socio-economic determinants which increase the regional or national CRC risks, thus exploiting new solutions, particularly in younger high-risk individuals in our European communities. For the validation of the developed solutions, a clinical validation study is planned to conducted, to assess its effectiveness, sensitivity and specificity in detecting CRC at an early stage. During the first phase of the study, we will identify the different expression patterns of the four diagnostic solutions (ONCO-VOC, ONCO-CRISPR, ONCO-NMR, ONCO-CTC) in CRC patients and healthy controls with high risk for CRC, and also initially estimate their sensitivity and specificity. During the second phase the ONCOSCREEN solution’ performance will be clinically validated.