Characteristics and prognosis of primary pulmonary osteosarcoma: a pooled analysis.

Background: Primary pulmonary osteosarcoma (PPOS) is an uncommon malignancy originating from the lung with low incidence, and its clinical characteristics and prognosis have not been systematically reported. Therefore, we aimed to recognize the prognostic factors and constructed a survival prediction model for PPOS.

Methods: We collected the data from the Surveillance, Epidemiology, and End Results database and systematic review of previous studies.