Askin Tumor

**Semantic type:** Neoplastic Process

**Definition:** A primitive neuroectodermal tumor (small round blue cell tumor) of the thorax which can involve the periosteum, thoracic wall and/or pleura though it spares the lung parenchyma.

**Synonyms:** - Askin tumor - Askin's Tumor - PNET of Thoracopulmonary Region - Peripheral Neuroectodermal Tumor of Thoracopulmonary Region - Small Cell Tumor of Thoracopulmonary Region