The impact of single and multiple occurrences, as well as the sequence of occurrences, of primary gastrointestinal cancer on overall survival: a comprehensive analysis based on the surveillance, epidemiology, and end results database in the United St

Different prognoses were observed in patients with different sequences of various primary gastrointestinal cancers. Patients with high mortality cancers in the FMP group may have potential factors, such as high treatment sensitivity, that could lead to improved OS. Patients with low mortality cancers in the NFMP group could benefit from positive treatment therapies.