CTICasesCannonball Pulmonary Metastases from Testicular Mixed Germ Cell Tumor
Imaging findings
Chest radiograph and chest CT demonstrate massive, bilateral, well-circumscribed "cannonball" pulmonary nodules and masses, accompanied by metastatic mediastinal lymphadenopathy.
Key takeaways
Cannonball metastases represent large, hematogenously disseminated pulmonary lesions classically associated with highly vascular or aggressive malignancies such as choriocarcinoma, renal cell carcinoma, sarcoma, and mixed germ cell tumors. Despite their imposing and extensive radiographic appearance, metastases from testicular germ cell tumors are often highly chemosensitive and can show a dramatic response to systemic therapy.
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