[Pneumoblastoma in children. Apropos of 2 cases]

Pulmonary blastoma is an exceedingly rare primary neoplasm in the paediatric age group. Pre-operative diagnosis is impossible because of its lack of specificity in clinical and radiological signs. The only diagnosis is the histopathological one. It is a malignant tumor capable of metastasis with a poor prognosis. The best method of treatment is still unknown but at the present time, the only survivals are the result of a complete and early surgical excision. The authors report 2 paediatric cases which have been observed at the hospital of Montpellier (France) for a 20 years period. They try to determine why children's pulmonary blastoma is slightly different from the adults one. They ask the question of histogenesis.