Systems and methods for detection of multiple cancer types

The present disclosure provides, among other things, methods for colorectal cancer, breast cancer, lung cancer and/or pancreatic cancer detection (e.g., screening) and compositions related thereto. In various embodiments, the present disclosure provides methods for screening that include analysis of methylation status of one or more methylation biomarkers, and compositions related thereto. In various embodiments, the present disclosure provides methods for detection (e.g., screening) that include detecting (e.g., screening) methylation status of one or more methylation biomarkers in cfDNA, e.g., in ctDNA. In various embodiments, the present disclosure provides methods for screening that include detecting (e.g., screening) methylation status of one or more methylation biomarkers in cfDNA, e.g., in ctDNA, using MSRE-qPCR and/or using massively parallel sequencing (e.g., next-generation sequencing).