Lung Undifferentiated Pleomorphic Sarcoma

**Semantic type:** Neoplastic Process

**Definition:** An exceedingly rare undifferentiated pleomorphic sarcoma that arises from the lung. In the vast majority of cases lung involvement is due to metastasis from another anatomic site.

**Synonyms:** - PPUPS - Primary Lung Undifferentiated Pleomorphic Sarcoma - Primary Pulmonary Undifferentiated Pleomorphic Sarcoma - Pulmonary Undifferentiated Pleomorphic Sarcoma