[Pulmonary blastoma at the site of a congenital pulmonary cyst]

Lung blastoma is a rare primary tumor of the lung. There are only 18 cases reported in medical bibliography under 15 years old. A girl 4 years old is reported. A pulmonary congenital cyst in right middle lobe was excised in other hospital at 15 months old. A pneumoblastoma developed at 4 years old in the same location. It was excised by bilobectomy and treated after words with radium and polychemotherapy. Evolution after 29 months of intervention is quite good. She is in good health without recidives or metastases. Lung blastoma is a mixed tumor composed by embryonic mesenchyma and endothelial cores of embryology origin. A review has been done about published cases and it's commented the relation between blastoma and peripheral pulmonary cysts. Three of the 4 cases in pediatric bibliography presented that association and in another the disorders merge with 3 years of influence. In our case the lapse was 31 months after cyst exeresis.