Pulmonary Blastoma

**Semantic type:** Neoplastic Process

**Definition:** A biphasic tumor that consists of fetal adenocarcinoma (typically low-grade) and primitive mesenchymal stroma. Foci of specific mesenchymal differentiation (osteosarcoma, chondrosarcoma, or rhabdomyosarcoma) may also be present, but are not required for the diagnosis. Most patients are smokers. The prognosis is very poor. (WHO 2015)

**Synonyms:** - Blastoma of Lung - Blastoma of the Lung - Lung Blastoma - Pneumoblastoma - Pneumoblastoma - Pulmonary blastoma