1. A case of pulmonary blastoma is presented, and together with other 46 cases from the literature are analysed.

2. Objective To summary the clinicopathological characterization and diagnostic experience of childrens blastoma.

3. Objective Detecting the pathological characteristics and histogenesis of pulmonary blastoma.

4. Conclusions PPB is a rare malignant tumor and should be distinguished from pulmonary blastoma, primitive neuroectoural tumor (PNET), embryonal rhabdomyosarcoma and other sarcomas.

5. ObjectiveTo investigate the clinicopathological features of adult type pulmonary blastoma(PB).