Pulmonary blastoma. A clinico-pathological study of eleven cases.

Eleven cases of pulmonary blastoma are presented, the largest series reported from one department to date. The frequency of pulmonary blastoma was found to be 0.5 per cent of all primary lung cancers. The variegated histologic appearance of the tumour and the diverging metastatic pattern are described in detail. In light of the complex histological picture and the biological behavior a suggestion of the histogenesis of pulmonary blastoma is attempted.