Pulmonary blastoma is a rare primary lung tumour associated with poor progn
osis. Despite modern diagnostic imaging and biopsy techniques, the diagnosi
s is usually not considered initially. A case of a 22-year-old man with a l
arge biphasic left-sided pulmonary blastoma, extending to the mediastinum,
is reported. It was treated by pneumonectomy and pericardiectomy with radic
al tumour resection from the anterior mediastinum, under cardiopulmonary by
pass. Adjuvant radiotherapy was used. 3 years postoperatively there is no s
ign of recurring disease.