High metastasis burden and high ECOG status were associated with increasing risk for progression and death.
REGRESSION
Kaplan-Meier estimates of (Multivariate analysis of progression-free and overall survival for the study populationThe analysis comprised a multivariate Cox regression model that included the relevant prognostic factors. Source data are provided as a Source Data file.Based on clinical and immunohistochemical features patients were independently classified for their putative primary by three experienced oncologists as previously described