Predictive modelling of overall survival in adult patients with primary diffuse large B-cell lymphoma of the breast using the Surveillance, Epidemiology, and End Results (SEER) database.

For patients with PB-DLBCL, a more convenient and accurate web-based prediction model was developed and validated, which showed relatively good performances in both discrimination and calibration during model development and validation. External evaluation and validation are warranted by further independent studies.