Rapidly progressive cystic lung disease in a patient with a scalp lesion.

We describe an elderly patient presenting with pneumothorax, cystic lung disease and a scalp lesion. The pneumothorax resolved after placing a chest tube and suction but recurred within a week. Progression of cystic features was also seen, and biopsies of the lung and scalp lesions were performed. Immunohistochemistry was positive for markers of endothelial cells (CD31 and ERG) and negative for markers expected to be positive in alveolar cells (keratin AE1/AE3 and TTF-1), supporting the diagnosis of metastatic angiosarcoma. Palliative chemotherapy did not prevent progression and the patient expired soon after. In describing the clinico-radiological correlation of metastatic angiosarcoma, we also briefly describe the approach to cystic lung disease. Understanding the pathophysiology of cyst formation in metastatic angiosarcoma may help clinicians to better appreciate and manage the full spectrum of cystic lung disease, especially with atypical features.

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Competing interests: None declared.