Main Points
primary gastrointestinal melanoma, tumor
TUMOR
Patients with primary gastrointestinal melanoma (PGIM) had poor prognosis with an 18.0-month median cancer-specific survival (CSS) time.Age, site, tumor size, Surveillance, Epidemiology, and End Results (SEER) stage, and therapy are independent risk factors associated with CSS in PGIM.A prediction nomogram for the CSS of PGIM patients was constructed.The risk stratification built in this study made well differentiation of patients with different risks of CSS.